Ocean Technology Systems Spectrum User manual

OCEAN TECHNOLOGY SYSTEMS
Spectrum
Full-Face Mask
Owner’s Manual

IMPORTANT INFORMATION
PLEASE REFER TO OUR WEBSITE AT :
WWW.OCEANTECHNOLOGYSYSTEMS.COM
FOR MORE INFORMATION ABOUT THE SPECTRUM
FULL FACE MASK
REVIEW MANUAL AND EMERGENCY PROCEDURES
BEFORE DIVING THIS EQUIPMENT. FAILURE TO
COMPLY MAY RESULTS IN INJURY OR DEATH.

3
TABLE OF CONTENTS
- Important Safety Notice -.................................................................................. 4
Introduction.......................................................................................................... 5
Warnings and Precautions ................................................................................. 6
Description........................................................................................................... 7
What is a “Full-Face Mask?”.............................................................................. 7
Environmental Protection ............................................................................... 7
Physiological Considerations ......................................................................... 7
Communications............................................................................................. 8
Anatomy of the Spectrum Full-Face Mask......................................................... 8
Head Harness Assembly................................................................................ 8
Drain Tab ........................................................................................................ 9
Visor Drain Holes ........................................................................................... 9
Inner Frame.................................................................................................... 9
Setting up the Spectrum Full Face Mask ........................................................ 10
Acceptable Zip-Ties for Installation.................................................................. 10
Installing Second Stage Regulator................................................................... 10
Inner Frame Installation ................................................................................... 11
Regulator Removal .......................................................................................... 11
Inner Frame Removal ...................................................................................... 12
Acceptable Second Stage Regulators ............................................................. 12
Regulator Exhaust Tees................................................................................... 13
Donning and Dofng Procedures .................................................................... 13
Overall Safety Inspection................................................................................. 13
Hoods and Seals.............................................................................................. 13
Donning and Adjustment.................................................................................. 14
Dofng.............................................................................................................. 15
Diving The Spectrum Full-Face Mask.............................................................. 15
Pre-Dive........................................................................................................... 15
Post-Dive Procedures...................................................................................... 15
Warning Note............................................................................................ 16
Training and Emergency Procedures.............................................................. 16
Emergency Procedures ................................................................................... 17
Installation of Communications....................................................................... 18
Buddy Phone®Installation Instructions .......................................................... 19
EM-OTS-2 Installation Instructions.................................................................. 20
Specications .................................................................................................... 21
Limited Warranty ............................................................................................... 22

4
- NOTICE -
This manual and the information contained herein are provided for use as
a maintenance and operation guide. No license or rights to manufacture,
produce, and/or sell either the manual or articles described herein are given.
Undersea Systems International, Inc., dba Ocean Technology Systems
hereinafter referred to as OTS, reserves the right to change specications
without notice. We recommend that all users read and fully understand this
manual before using a Spectrum Full-Face Mask (FFM).
All statements, technical information, and recommendations herein are
based on tests we believe to be reliable, but the accuracy or completeness
thereof is not guaranteed; and the following is made in lieu of all warranties,
expressed or implied, including the implied warranties of merchantability
and tness for purpose: Seller’s and Manufacturer’s only obligation shall
be to replace such quantity of the product proved to be defective. Before
using, the user shall determine the suitability of the product for intended
use, and the user assumes all risk and liability whatsoever in connection
therewith. Neither Seller nor Manufacturer shall be liable either in tort or
in contract for any loss or damage—direct, incidental, or consequential—
arising from the use of or the inability to use the product. No statement or
recommendation not contained herein shall have any force or effect unless
it is in an agreement signed by ofcers of the Seller and Manufacturer.
- IMPORTANT SAFETY NOTICE -
(Please read before using product)
It is absolutely essential that all users are certied divers in good
standing, properly trained, equipped, and fully understand this
user’s manual before attempting to use the Spectrum FFM. While the
Spectrum FFM does provide the diver with outstanding underwater
environmental protection, it does not change or eliminate the potential
hazards of diving!
Refer to the User Manuals page of our Web site at,
www.oceantechnologysystems.com for a list of any changes made to
this manual since its publication.
© Copyright 2018 by Undersea Systems International, Inc., dba
Ocean Technology Systems. All rights reserved.
Specications are subject to change without prior notice.

5
INTRODUCTION
Congratulations on the purchase of your new OTS Spectrum Full-Face
Mask! This full-face mask (FFM) is one of the few that has been designed
from the ground up as a scuba diving mask. The Spectrum FFM was
designed with comfort, t, and function in mind. Having been in the
underwater communications business for over three decades, Ocean
Technology Systems (OTS) created the Spectrum FFM based around
what we’ve learned from listening to the needs of our customers. Our goal
was to design a product that was comfortable, t the vast majority of the
diving population, was simple to use, easy to maintain and would t most
2nd stage regulators. More importantly, it had to be rugged and perform as
well or better than anything on the market.
OTS is proud to provide you with this advanced diving apparatus and hope
you enjoy it as much as we do.
All who intend to use this Spectrum FFM must read this manual carefully
prior to preparing and using this equipment. Training must be obtained
before using this or any other advanced diving equipment. Become familiar
with emergency procedures and ensure you are equipped with proper
bailout equipment appropriate for the type of diving you are performing.
If you have any questions or don’t fully understand this manual, please
contact OTS directly or an authorized OTS Dealer (OTS contact information
is listed under the “Limited Warranty” on page 22).
Danger Note
• Undersea Systems International Inc. dba Ocean Technology Systems
cannot guarantee diver’s protection from contaminated diving
environments, including but not limited to : biological, chemical,
radioactive contaminates.

6
Warning Note
• Diving a Spectrum Full-Face Mask or any scuba diving equipment without
proper training and experience can result in serious harm or death.
• This is an advanced piece of diving equipment that requires special
training and practice prior to diving it in an open water environment.
Proper maintenance and care of this equipment is essential for safe
operation.
• Always inspect the Spectrum Full-Face Mask for damage prior to diving
if you suspect it has been subjected to any abuse, tampering, or impact.
• It is YOUR responsibility to insure that your equipment is in good condition
and operating properly. Remember, this is LIFE SUPPORT EQUIPMENT!
• Diving is an inherently dangerous sport. Participating in this activity puts
you at risk of serious injury or even death.
• Prior to diving the Spectrum FFM, ensure it is clear of all packing materials
or any other foreign debris.
WARNINGS AND PRECAUTIONS
While reading and reviewing this manual, please note the following
indicators for Warnings and Dangers:
Warning Note
The “Warning” symbol indicates something that
might cause damage to the equipment, or, if not
properly performed, may lead to a hazardous
situation that could cause injury or death.
Danger Note
The “Danger” symbol indicates a most important
point that if not avoided will result in a situation
that causes injury or death.

7
DESCRIPTION
What is a “Full-Face Mask?”
The OTS Spectrum FFM differs from standard scuba equipment in that the
second-stage regulator is incorporated into the mask and the mask covers
your “full” face, hence the term.
There are four primary reasons to dive a Spectrum FFM:
1. Environmental protection
2. Physiological considerations
3. Communications
4. For the fun of it
Environmental Protection
Anytime a diver is in water that would be considered less than healthy (e.g.,
biological/chemical contamination, extreme cold, etc.), protection is of the
utmost importance. The Spectrum FFM affords a signicant protection
advantage over that of a standard bite regulator and mask. While not a
substitute for full protection as required in hazmat diving, the Spectrum
FFM can add protection in contaminated water that standard equipment
cannot. This conguration is commonly seen in light commercial and
public safety diving.
Physiological Considerations
The Spectrum FFM protects the diver in other ways as well. If, for any
reason, a diver were to become unconscious underwater, the Spectrum
FFM is able to maintain a breathable airspace in front of the diver’s nose
and mouth assisting in survival (assuming the scuba tank has air). This
aspect of the Spectrum FFM is extremely useful for divers with TMJ,
dentures, disabilities, and for those divers using high concentrations of
oxygen (convulsion risk).
Warning Note
• Diving a Spectrum Full-Face Mask or any scuba diving equipment without
proper training and experience can result in serious harm or death.
• This is an advanced piece of diving equipment that requires special
training and practice prior to diving it in an open water environment.
Proper maintenance and care of this equipment is essential for safe
operation.

8
Anatomy of the Spectrum Full-Face Mask
Front Aspect
KEY:
1. Upper Lens Clamp
2. Lower Lens Clamp
3. Push-to-Talk (PTT)
Communications Port**
4. Drain Tab
5. Regulator Port
6. Inner Frame Port
7. Visor Drain Holes (located
inside mask)
8. Tempered Glass Visor
9. Accessory Attachment
Points
10. Accessory Attachment Point
11. Buckle (5 total)
Figure 1: Front of Mask
**Shown with communications PTT switch (not included)
1
2
36
4
10
5
8
9
7
11
Communications
In order to use underwater communications, an airspace is required to
allow for articulation and placement of a microphone. The Spectrum FFM
has an oral/nasal cavity that provides optimal communications, while
some FFMs have the nose separated from the mouth. This separation
alters the voice slightly, as in pinching your nose when talking and does
not achieve optimal underwater communications.
Figure 2: Five-Point Head
Harness
Head Harness Assembly
The Spectrum FFM uses a ve‑point
strapping system (Figure 2). Buckles are
mounted by a button securely on tabs that
are a part of the skirt. If needed, they are
replaced easily by stretching the tab and
either removing or replacing the button end
of the nylon buckle.

9
Drain Tab
The Purge Drain Tab is located under the
chin pocket of the mask and is designed
to help fully eliminate any residual water
remaining after a ood and clear of the
mask. After clearing the majority of the
water out via the regulator purge button
simply pull down on the tab and blow out
any remaining water.
Visor Drain Holes
The Spectrum features two Visor Drain
Holes located in the inside of the mask
on the top of the oral nasal pocket where
the “teardrop” portion of the visor meet.
The holes are designed that if water pools
in the visor, it will drain into the oral nasal
pocket where it can then be evacuated by
blowing out the nose or mouth, or by using
the purge button of the 2nd stage regulator.
Inner Frame
The inner frame located in the oral nasal
pocket is key in properly mounting a second
stage regulator into the Spectrum FFM.
The purpose is to add rigidity to the mask
while adding the least amount of weight as
possible. When the inner frame is properly
implemented, the oral nasal pocket is
signicantly strengthened. This reduces the
amount of “push / pull” effect of the second
stage regulator when inhaling & exhaling,
as well as limiting the range of motion of
the regulator.
Figure 3: Drain Tab
Figure 4: Visor Drain Hole
Figure 5: Inner Frame

10
SETTING UP THE SPECTRUM FULL FACE MASK
Acceptable Zip-Ties for Installation
Prior to installing second stage regulator into the Spectrum FFM, ensure
the inner frame is not installed and the regulator port is not damaged.
Locate the zip tie included with the Spectrum FFM. (Only use a military
standard MS3367-7-0 zip tie).
Installing 2nd Stage Regulator
Remove bite mouth piece (if installed)
from second stage regulator. Insert second
stage regulator mouthpiece tube into
the regulator port through the front of the
Spectrum FFM. Ensure the end of the
regulator port corresponds with the end of
second stage regulator.
Install zip tie tightly around second stage
regulator so that it wraps around and
fastens the mouthpiece tube securely to
the Spectrum FFM. Ensure the ratchet of
the zip tie is oriented along the horizontal
axis of the regulator port (Figure 7).
NOTE : Figure 7 & 8 shown in a
clear skirt for contrast. Clear skirts
are not available for purchase
Danger Note
• It is vital that installing the zip-tie into the Spectrum FFM is done correctly
with the specied zip‑tie. Improperly installing the zip‑tie and regulator
can result in the regulator becoming dislodged from the mask resulting in
possible injury or death!
Figure 6: Installing Regulator
Figure 7: Install Regulator

11
Inner Frame Installation
It is vital that the inner frame is installed
prior to diving. Route the end with the
threaded OTS cap through the left side of
the oral nasal pocket. The right side of the
inner frame should t around the outside
Push-To-Talk button assembly in the oral
nasal pocket or the comm port plug if no
communications are installed. Verify that
the Inner Frame is not between the head
of the zip tie and the FFM skirt (Figure 8).
Once installed, tighten down (clockwise)
the inner frame using the additional comm
port cap (Figure 9). The cap should be snug.
Verify that the inner frame is not between
the zip tie’s ratchet and the FFM skirt. See
Figure 8 for a correctly installed regulator
and inner frame. Give a slight tug to ensure
the regulator is secured correctly.
Regulator Removal
Using a pair of wire cutters or pliers, crush
the head of the zip tie around the second
stage regulator and carefully pull second
stage regulator mouthpiece tube out of
the regulator port of the Spectrum FFM.
DO NOT USE ANY SHARP OBJECTS
TO REMOVE ZIP TIE OR REGULATOR.
DOING SO MAY DAMAGE OR TEAR THE
SKIRT OF THE MASK.
Figure 9: Tighten
Inner Clamp Port
Figure 8: Install Inner Frame
Figure 10: Regulator Removal

12
Inner Frame Removal
To remove the inner frame, remove the
second stage regulator and then unscrew
(counterclockwise) the right cap with the
included OTS wrench. Once the cap is off,
stretch the skirt of the mask and lift the Inner
Frame in and out of the oral nasal pocket.
Acceptable 2nd Stage
Regulators
The regulator port of the Spectrum allows
regulators from 3/16” x 5/8” and sizes up to 1-7/16” x 13/16”.
NOTE : The regulator port can be safely stretched up
to 50% to allow bigger sized mouthpiece tubes.
Ensure the mouthpiece tube of regulator being installed has one single
lip that has a minimum length of .50” (See
Figure 12) and is not double lipped. DO
NOT USE REGULATORS THAT HAVE A
DOUBLE LIPPED MOUTHPIECE.
A properly secured mouthpiece and
regulator should be able to withstand a
weighted pull test of 25 pounds for 25
seconds.
NOTE : Not all second stage
regulators available can
be properly mounted.
Figure 12: Minimum
Mouthpiece Tube Length
Figure 11: Inner
Frame Removal

13
Regulator Exhaust Tees
The size of the regulator mouthpiece tube and size of the exhaust tees can
affect performance of the mask. An incorrectly installed regulator can lead
to ooding of the mask, which may result in serious injury or death. If the
regulator has exhaust tees, ensure they do not interfere with the mask and
there is a clear path for gas to exhaust.
DONNING AND DOFFING PROCEDURES
Warning Note
ALWAYS inspect your diving equipment to ensure it is not damaged or
defective and that it is fully functional. DO NOT dive the Spectrum FFM or
any other equipment if you have not veried that it is in good condition and
working properly! If this equipment has been damaged, tampered with, or
found to be defective, return it to OTS or replace components immediately.
Overall Safety Inspection
Prior to donning the Spectrum FFM, examine the complete assembly along
with the rest of the gear to ensure that it is in dive-ready condition. The
diver is ultimately responsible for his/her equipment. Check all buckles,
strap assembly, visor clamp assembly, visor, skirt, inner frame and
regulator. Then extend all straps and prepare to don the mask. Establish
equalization is achievable.
Hoods and Seals
To achieve the best seal, the mask skirt should be tted directly onto
the skin of the diver’s face (Figure 13). Do not attempt to seal over or
against a neoprene hood as this will result
in leaking, excessive air consumption,
and hood ination. A neoprene hood can
be trimmed to allow for the mask to seal
properly against the face.
For dry suits that have latex seals, the
mask may be worn directly over the hood.
This type of hood allows for the mask to
seal properly over the hood and the hood
seals to the face.
Figure 13: Fit Mask Skirt
onto Skin, Not Hood

14
Donning and Adjustment
Proper donning of the Spectrum FFM is crucial when using diving
equipment. An improperly adjusted mask will result in jaw fatigue,
increased air consumption, leaking, and an overall poor t.
First and foremost the Spectrum FFM must be tted to the chin; the rest of
the mask will seal to the face where it lays.
With the mask straps fully extended, move
the communications (either the Buddy
Phone or EM assembly) as far as possible
to the rear of the straps to prevent them
from binding against the buckles. Open
the lower straps and bring the mask and
harness over the head (Figure 14). Ensure
the harness is straight and the center is low
on the back of the head.
Hold the Spectrum FFM to the face with one
hand and tighten the lower (jaw) straps one
at a time, switching hands to accommodate
tightening the other. Pull the straps toward
the back of the head, not out to the side.
Tighten the straps evenly to prevent pulling the back of the head harness
off center. Do not overtighten.
Next, tighten the temple straps evenly. If
necessary, tighten the top strap just enough
to pull the top of the skirt tighten to the
forehead. DO NOT OVERTIGHTEN THE
TOP STRAP! This can result in jaw fatigue
after just a short period of time. Wiggle the
Spectrum FFM on the face to ensure the
mask is in proper position and centered
with no stress points. Evenly tighten the
straps (Figure 15) to the desired tension,
again not overtightening the straps. The
mask should be comfortable on the face.
Overtightening the top strap will cause
the center of the head harness to sit high on the back of the head. This
results in the mask being pulled up on the face and not back, as desired.
Consequences of this error include possible leaking, jaw fatigue, and an
uncomfortable dive. If there is the need to tighten the top strap, pull down
on the back of the head harness to ensure its proper positioning low on the
back of the head. Tighten the top strap as necessary.
Figure 14: Open Lower Straps
and Bring Over Head
Figure 15: Tighten
Straps Evenly

15
Finally ensure equalization is achievable.
Dofng
To remove the mask (Figure 16), grasp the
bottom of the mask with both hands and
use thumbs to grasp bottom buckle tabs
and loosen. Then, pull the mask out and off
of the head.
DIVING THE SPECTRUM FULL-
FACE MASK
Pre-Dive
Prior to entering the water, check the
submersible pressure gauge (SPG). This is done by taking two deep
breaths through the mask while observing your SPG. There should be a
slight drop in pressure. If there is a signicant drop in pressure, check that
the air supply is working properly. If the gauge shows a drop, and the air
supply is turned on correctly, have the equipment examined immediately
for proper function.
Post-Dive Procedures
After a diver has completed diving, remove the Spectrum FFM. Thoroughly
rinse the Spectrum FFM in clear, fresh water and pat it dry with a lint-free
absorbent cloth. If necessary, a mild detergent may be used for cleaning the
Spectrum FFM. Never use any harsh detergents, abrasives, or solvents
on your Spectrum FFM. Use caution when drying the visor after diving in
a sandy environment to prevent any scratching of the lens. Do not use
paper towels to dry or clean visor—scratching of the lens may occur.
Hang the Spectrum FFM upside down to allow for any trapped water
to drain to the top of the skirt. Wipe out the excess water and allow the
Spectrum FFM to air dry prior to storing. If stowing a damp mask, remove it
from the bag as soon as possible and allow it to dry completely to prevent
any mold and mildew from forming.
Rinse the Spectrum FFM and regulator with fresh water. Shake any
remaining water from the Spectrum FFM.
Figure 16: To Remove Mask,
Use Thumbs to Grasp Bottom
Buckle Tabs and Loosen

16
Warning Note
If the Spectrum FFM has been exposed to contaminated water it
should be cleaned.
Training & Emergency Procedures
As with any high-tech equipment, the Spectrum FFM does require
additional training and practice. Air sharing in an out-of-air situation is
more difcult, often requiring bailing out of the mask (depending on the
gear conguration).
Regardless of prior FFM diving experience, take some time to dive the
Spectrum FFM in a pool or similar environment. Follow the guidelines in
this manual and seek additional instruction if necessary. Learning how to
dive the Spectrum FFM to a point that feels completely comfortable with
all aspects is critical. In addition to procedures on using the equipment,
there are emergency procedures for out-of-air (OOA) situations and
possible equipment failure situations requiring bailout and switching to an
alternate air source. Do not dive this assembly or any equipment until
properly mastering these emergency procedures!
As part of the basic familiarization with the Spectrum FFM, bailout
procedures are a required skill. In the event of an OOA situation, the diver
must have an available source of back-up air. A pony bottle or dive buddy
needs to be close by. A practice session should start in the shallow end of
a swimming pool or similar environment, working either at the bottom or
a xed point so not lose control of depth or position in the water column.
Additional training and procedures are recommended in diving in
extreme cold / ice environments.

17
FOR BAILOUT PROCEDURES:
• ALWAYS have an available source of back-up air (pony bottle,
dive buddy, etc.) and know its location.
• Do NOT hold your breath!
• Start practice sessions in shallow end of swimming pool or similar
environment.
• During practice, work at the bottom or a xed point in the pool.
• It is recommended that you carry a spare mask.
Emergency Procedures
First, know the location of the alternate air supply, then remove the
Spectrum FFM. This is best done by grasping the bottom of the mask
and placing the thumbs on the lower buckle tabs. Pull out on these tabs,
loosening and rotating the mask forward and back over the head. Exhale
slowly, do not hold breath. Obtain the alternate air source, clear the
regulator, and breathe normally. Don a spare mask, or terminate the dive
without one.
This skill takes practice and preparation! Keep working on the bailout
technique until mastering this skill.
Another important skill is donning the mask while underwater. Begin by
setting up the mask in the same way as donning it on the surface (extending
the straps, pulling any communications to the rear, etc.). Prepare to be
without air for the short time it takes to perform this exercise. Remove the
spare mask, if applicable, as well as the alternate air source. Again, do
not hold breath. Slightly exhale continuously. Drop the mask over the
head and press the mask to the face.
To clear the mask of water, if you have sufcient air in your lungs, start to
exhale as this will displace the water and clear the mask. At the same time,
look up at about a 45° angle, pull out slightly on the bottom of the mask,
then push the purge on the regulator halfway. This will clear the majority of
the water from the mask.
If there is not sufcient air in the diver’s lungs, push the purge button of the
diver’s regulator until the mask is cleared of water.
Take a cautious breath to ensure the mask has cleared and to prevent
inspiring any residual water. After the rst inhalation, pull down on the
drain tab, look down and exhale forcefully to clear any remaining water.
Repeat this forceful exhalation a few more times. Again, ensure this skill
is mastered.

18
Training Tips
Upon surface entry, secure the mask to the face with one hand. Breathe
normally and never hold your breath. Upon descending, equalize, early
and often, prior to experiencing any pain or signicant pressure. Stop
descending if equalization cannot be achieved or if pain occurs, descending
only if proper equalization can be achieved.
If the mask requires adjustment while diving, tighten or loosen the straps
as required. Be careful not to overtighten. Inate Buoyancy Compensating
Device (BCD) and swim on back if a surface swim is required. It is
recommended that removal of the mask occurs only after exiting the water.
This is important if the quality of water is contaminated.
Note: The diver should plan the dive to be back to the boat or beach
while air is still available in the tank.
INSTALLATION OF COMMUNICATIONS
The Spectrum FFM is designed to
accept Ocean Technology Systems
(OTS) communications. There are two
primary communication systems designed
specically for the mask: The Buddy
Phone®(see “Buddy Phone®Installation
Instructions” on page 19)and the OTS
earphone and microphone assembly (see
“EM-OTS-2 Installation Instructions” on
page 20).
The Buddy Phone is a stand alone
communications system designed with the
transceiver mounted on the head harness
located on the right side of the diver’s head. The Buddy Phone has a built‑
in earphone.
The OTS earphone and microphone (EM) assembly is for all other through-
water and hardwire communications systems. Regardless of the system,
the EM assembly mounts to the mask in the same manner.
If the Spectrum FFM was purchased without communications equipment,
there will be a blanking plug installed in the communications port. This
consists of a plug on the inside (of the mask) secured with a threaded,
locking ring on the outside (Figure 17). To remove, use the OTS wrench
(P/N 137053-000) to unscrew the locking ring counterclockwise and
remove the plug from the inside.
Figure 17: The Blanking Plug

19
BUDDY PHONE®INSTALLATION INSTRUCTIONS
Refer to Figure 13 and proceed as follows:
1. Locate the communications port
on the right side of the mask.
Unscrew (counterclockwise) the
fastening nut from the plug using
OTS wrench. Remove the plug
and store for possible future
use (Figure 12 on page 18).
2. Loosen (counterclockwise)
the captive fastening nut on
the microphone and push-to-
talk (PTT) module of the Buddy
Phone. Allow enough space between the fastening nut and
the base of the module to accept the lip of the mask.
3. Insert the microphone and PTT module into the mask’s
right communications port. The nickel microphone
wires may need to be bent slightly to install.
4. Continue inserting the microphone and PTT module into the
communications port. The lip of the mask should go over the base
of the module and rest between the base and the fastening nut.
5. The fastening nut is then screwed down clockwise until
tight against the mask. The Buddy Phone cable should be
pointing towards the Buddy Phone above the right ear.
6. Once the microphone is inside the port, carefully position it within
1/4” of the right corner of the diver’s lips. The port accepts either
the ME150 Microphone, ME-16R Hot-Mic, or Super Mic.
7. Fully insert the upper right head strap of the mask into the
strap retainer slot on the OTS-BUD-D2 so that the Buddy
Phone will be positioned above the right ear. Stretching
the strap will make it easier to slip into the slot.
8. Before donning the mask, position the Buddy Phone as far back
as possible to allow for tightening of the mask straps. Once
tted, adjust the Buddy Phone over the right ear as needed.
Note: In most cases of weak or bad communication, OTS has found that
the microphone has been installed under the seal and toward the chin.
The microphone needs to be clear of the seal and in the correct position
for good, clear communications.
Figure 18: Spectrum FFM
with Buddy Phone®

20
EM-OTS-2 INSTALLATION INSTRUCTIONS
Refer to Figure 11 and proceed as follows:
1. Locate the communications port on the
right side of the mask. Using the OTS
Wrench, unscrew (counterclockwise) the
fastening nut from the plug and remove.
Remove the plug from inside and store for
possible future use (Figure 17 on page 18).
2. Loosen (counterclockwise) the captive
fastening nut on the microphone and
push-to-talk (PTT) module of the earphone
and microphone assembly. Allow
enough the base of the module to accept the lip of the mask.
3. Insert the microphone and PTT module into the mask’s
right communications port. The nickel microphone
wires may need to be bent slightly to install.
4. Continue inserting the microphone and PTT module into the
communications port. The lip of the mask should go over the base
of the module and rest between the base and the fastening nut.
5. The fastening nut is then turned clockwise
until tight against the mask.
6. Once the microphone is inside the port, carefully position it within
1/4” of the right corner of the diver’s lips. The port accepts either
the ME150 Microphone, ME-16R Hot-Mic, or Super Mic.
7. The left earphone cable travels snug up the right
side of the visor and over the top by tucking the wire
into the groove between the mask and visor.
8. Insert the temple and jaw mask straps through the top and
bottom slots of each earphone holder, respectively. The snaps
face toward the front of the mask with the OTS logo on each
earphone holder upright. Reassemble the mask straps.
9. Insert the earphone into the earphone holder (on each side) past the
snaps with the cable positioned below the snap. Secure the snap.
10. The earphone cable should exit the holder below the
snap and run parallel with the mask straps.
Note: In most cases of weak or bad communication, OTS has found that
the microphone has been installed under the seal and toward the chin.
The microphone needs to be clear of the seal and in the correct position
for good, clear communications.
Figure 19: Spectrum
FFM with EM-OTS-2