Wesmar SS395 User manual
SS395 Sonar
INSTALLATION &
OPERATION MANUAL
WESTERN MARINE ELECTRONICS
14120 NE 200th Street, PO Box 7201
Woodinville, WA 98072-4001 USA
Telephone: (425) 481-2296 Fax: (425) 486-0909
August 2012
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Part 1:
Sonar Controls
1.1 Hand Control
All sonar adjustments are conducted
through the hand control.
1.1.1 Trigger Switch
The trigger switch will move the cursor from
the sonar screen to the selection screen when
adjustments are needed. After adjusting, the trig-
ger switch will return the cursor back to the sonar
screen.
1.1.2 Four-way Control Switch
The four-way control switch will move the cursor
up/down, left/right on the sonar screen. By placing
the cursor on a target both horizontal and vertical
measurements are logged in the space noted by the
arrows, center right of screen.When the cursor is
in the selection screen the four-way switch will
move the cursor up/down to the item for adjust-
ment. Moving the four-way switch left/right will
make the change.
1.2 Switch Panel
Both the sonar and the hoist are independent
of one another. The sonar has its own on/
off switch and the hoist has its own down/
up switch.
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1.2.1 Sonar On/Off Switch
The sonar on/off switch is fused with a 10
amp slow blow (MDL) fuse. This fuse is
inline with a fuse on the power supply board
inside the computer box. The power supply
fuse is 7.5 amp fast blow (AGC) for 12 or
24 volt operation.
1.2.2 Hoist Down/Up
To lower the hoist push down on the hoist switch.
If the hoist is hydraulic a green light will glow
when the motor is running and turn off when the
motor stops. The green light is not used with the
lead screw hoist systems. On all systems a red light
will stay on as long as the hoist is down.
1.2.3 Hoist Fuse
On lead screw hoist systems the fuse used is MDL
(slow blow) 3.2 amp. On hydraulic systems use
AGC (fast blow) 1 amp. If the fuse is open the
hoist will not go down.
1.3 Selection Screens
There are four selection screens where adjustments
are made. Each adjustment can be viewed as the
sonar runs to maximize target detection. The four
selection screens are titled as; Wesmar 395, Sonar,
Proler and Local. To make an adjustment to the
sonar, trigger once with the hand controller. This
will activate the Wesmar 395 selection screen. To
enter any of the other three selection screens push
up or down on the four way switch until SET UP
is highlighted. Push left or right on the four way
switch for: S = Sonar, P = Proler, L = Local then
trigger with the hand controller. After adjustments
are made, trigger the hand controller to move the
cursor back to the sonar screen.
1.3.1 Wesmar 395 Selection Screen
Wesmar 395 is the rst screen to appear when
triggered with the hand controller. All of the
adjustments are for sonar with the exception of
NEAR P and FAR P, which are gain adjustments
for prole.
Lead Screw Hoist
Hydraulic Hoist
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RANGE
Sonar range can be increased or decreased by push-
ing the four-way switch on the hand controller to
the left or right. Range units; meter, fathom, feet
are selected in selection screen Local.
TILT
Transducer can tilt up +4 degrees above the hori-
zontal to –90 degrees straight down. A 0 degree tilt
will center the sound beam horizontally.
CENTER
Move the sector in nine-degree steps around the
screen.
REVERSE
Reverse will change the direction of scan. This
is the recommended method when following fast
moving tagets such as tuna and game sh. There
are two ways to reverse scan.
1. Highlight reverse, push the four-way switch to
the left or right. Each time the four-way switch is
pushed scan will reverse.
2. Highlight reverse, pull the trigger to reverse scan.
Pull the trigger again to highlight reverse then pull
the trigger to reverse. As fast as one can pull the
trigger two times the scan will reverse.
THICK
Thickness will work in sonar screen #1 only. Thick-
ness is scanning up and down through the target
or over the bottom. This is an excellent way to see
if there are more sh under the sh schools that
were scanned in the horizontal or to determine the
vertical size distribution of the school. Thickness
can also be used to prole the bottom out in front
to measure depth when entering uncharted
waters.
There are two ways to activate thickness.
1. Highlight thick. Wait for the horizontal scan
to pass through the target. Pull the trigger, the
transducer will stop and start to scan up and down
through the target. The vertical display will show
in the lower right of the screen. As the target
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moves the thickness mode of operation can
move to follow the target by pushing the four-way
switch to the left or right. Reverse can also be used
to change direction of the vertical scan. To end the
thickness mode pull the trigger twice.
2. Highlight thick. Push the four-way switch to
the left or right. The transducer will stop and start
to scan up and down. Push the four-way switch a
second time to end thickness mode. Note: Entering
thickness mode by using the four-way switch will
disable the ability to change bearing. Bearing can
only be changed when entering thickness by using
the trigger switch.
SECTOR
Select the area to be scanned from full circle; 360
degrees down to 11 degrees.
SPEED
Controls the scanning speed of the sound beam.
Speed 1 is for ne resolution. Speed 4 is for fast up-
date. Faster speeds may lose single sh targets.
ZOOM
In Screens 1, 2 and 3 the cursor can be used as
a magnier. By activating zoom the target under
the cursor will magnify for a close inspection.
The perimeter line around the cursor indicates the
magnied area.
NEAR S
Near gain adjustment for sonar. Gain numbers run
from 0 to 100. Regardless of range the near gain
has more control over targets from the center of
the screen to half way out. Adjust for best presen-
tation.
FAR S
Far gain adjustment for sonar. Gain numbers run
from 0 to 100. Regardless of range the far gain has
more control over targets from half way to the end
of screen range, or the last half of range selected.
Adjust for best presentation.
NEAR P
Near gain adjustment for prole. Prole gains are
separate from sonar. Gain numbers run from 0 to
6
100. Regardless of range the near gain has more
control over targets from the center of the screen
to half way out. Adjust for best presentation.
FAR P
Far gain adjustment for prole. Gain numbers run
from 0 to 100. Regardless of range the far gain
has more control over targets half way to the end
of the screen range. Prole is frequently used to
prole the bottom. FAR P adjustment is used to
bring bottom markings in strong.
SET UP
Set up provides access to three other selection
screens; SONAR, PROFILE, LOCAL. To acti-
vate one of the three screens rst trigger the hand
controller once. The WESMAR 395 screen will
appear. Move the four-way switch up or down to
set up. Push the four way switch left or right to
highlight the selection screen you want to go to.
Trigger the hand controller for the second time to
view the screen.
By triggering the hand controller the third time will
place the cursor back into the sonar display.
COLOR BARS
There are two color bars, one on top of the other.
The top color bar represents the colors and thresh-
old for sonar. The bottom bar represents the colors
and threshold for prole. Adjustments are found in
SONAR and PROFILE.
1.3.2 SONAR
Sonar refers to horizontal scan around the vessel.
This is different from prole where the transducer
scans from side to side beneath the vessel. To
maximize target detection both sonar and prole
each have their own selection screen. Adjustments
can be different from the other. The SS395 will
store the settings and recall them the next time the
system is turned on. However, if there is more than
one application (more then one shery) a record of
the settings should be kept.
RANGE
Same range adjustment under Wesmar 395. For
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convenience sonar range is repeated.
PULSE
Pulse refers to the transmit pulse or the time the
transmitter is on pushing sound energy into the
water. A long pulse, 100% is best for long-range
detection. Selecting shorter pulse lengths will
increase range resolution separating two targets
close together. As the pulse length is shortened,
near and far gains will need to be increased.
SECTOR
Same sector adjustment found in the last selection
screen, Wesmar 395. For convenience sector is
repeated.
TVG
Time Variable Gain offsets propagation loss as
sound energy moves through the water. A target
at long range will have a small echo than close
to the vessel. In order for this target to mark the
same color at different ranges the receive gain must
increase proportionally with range. Propagation
losses of sound energy will change with frequency,
salinity, and the amount of plankton and algae in
the water. Adjust TVG according to the frequency
of the sonar.
Adjustment:
160kHz set TVG to 400,
span 200 to 600
110kHz set TVG to 600,
span 400 to 800
60kHz set TVG to 800,
span 600 to 1000
Each 100 units will equal 250 ft or 75 meters of
range. A setting of 400 will then equal 1000 ft or
300 meters. When using the blue background a
gray ring will display on the screen equal to the
TVG setting. Targets on the inside of the ring will
be compensated for propagation losses where
targets outside the ring will become stronger as
the vessel approaches until the target cross over
the gray ring.
SPEED
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Speed will change the scanning speed of the trans-
ducer. A speed of one will step the transducer in
1.8 degree steps, where a speed of four will step
in 7.2 degree steps. A speed of one is considered
regular scan with ne resolution where a speed of
four yields a faster scan with lower resolution.
ENHANCE
Enhance is one of three lters. Selections are
from OFF to 5. Enhance will help in target recog-
nition of individual targets such as tuna, salmon,
and sports sh. If bottom typing for shrimp, turn
enhance off.
FILTER
Filter is the second of three lters. Filter is used to
lter out unwanted returns and reduce clutter from
the screen. Filter should be turned off when scan-
ning for small targets. Use Filter when scanning
for schools of sh and bottom typing
LIMITER
The third of the three lters. The limiter can be ON
or OFF. When ON, interference from any other
sonar/sounder equipment on board will not mark
on the screen. This is accomplished by eliminating
all targets that are not present in two consecutive
transmits at the same range. The limiter is very
effective; however, when scanning for individual
targets it is recommend to turn the limiter OFF.
When the limiter is ON there will be a (?) after
ON to question the operator if this is the correct
setting.
THRESH
Or Threshold. Selections are from 1 to 4. In order
for a target to display on the screen, the echo, after
going through the receiver, must be strong enough
to reach the colors. The colors can be raised or
lowered. Lowering the threshold will display all
targets including weak ones without adjusting
gains. Raising the threshold will remove weak
targets leaving only strong targets on the display.
DELETE
Delete will remove targets colors weak to strong.
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CLIP
Clip is a color stronger then red. Clip is primarily
used for bottom typing to distinguish between,
rock, sand, or muddy bottom. On hard bottom ad-
just gains so bottom just marks in the clip color.
BACK
Back or background is the color behind the targets
on the screen. 1=Black, 2=Blue and 3=White.
Black can be used at night and during the day. At
night the black background emits no light and the
targets stand out in ne detail. For nighttime view-
ing it is recommended to lower the brightness of
the text or words on the right of the screen. To dim
the text go to the LOCAL page and increase the
number for TEXT. Blue and White are normally
day time screen. A background color will increase
the contrast making the target much easier to view.
If small targets are of interest try the white back-
ground and select 4 to 6 on PALETTE.
PALETTE
Palette deals with target color brightness from blue
to red. When using a low threshold the screen
may by full of blue and green targets. Too much
color on the screen may be distracting; however,
the weak targets are telling the operator something
about the area of search. Palette is a brightness
scale that will dim target colors from weak to
strong. Select a palette number that will dim the
weaker targets without removing them from the
screen. This helps in strong target recognition with
less fatigue to the operator.
1.3.3 PROFILE
Prole scans the transducer from side-to-side un-
der the vessel like a pendulum of a clock. Prole
expands bottom coverage not covered by down
sounders. Because the sound beam is narrow
resolution off the bottom is very good. The SS395
in prole will cover the bottom six times that of
a down sounder without the loss of resolution.
To optimize detection prole has its own adjust-
ments.
10
When operating in split screen, SONAR settings
are used when scanning horizontal. When the
transducer moves to prole the PROFILER set-
tings will be used.
RANGE
When proling the bottom select a range equal to
twice the depth. This will give full bottom coverage
across the screen.
PULSE
A long transmit pulse, 100% will deliver more
power into the water then a short pulse. A short
pulse has superior range resolution then a long
pulse. When proling for sh just off the bottom
a short pulse should be selected. As the pulse
length is shortened, near and far gains will need
to be increased.
SECTOR
Prole has its own sector sizes with the center mark
straight down.
TVG
Time Variable Gain offsets propagation losses
as sound energy moves through the water. These
losses are compensated by the TVG setting. Losses
are different with different frequencies.
Adjustment:
160kHz set TVG to 300, span 200 to 600
110kHz set TVG to 500, span 400 to 800
60kHz set TVG to 700, span 600 to 1000
SPEED
Speed will change the scanning rate of the trans-
ducer as it sweeps over the bottom. For good bot-
tom detail use speed 1.
ENHANCE
Enhance is one of three lters. Enhance will help
in target detection of sh and objects on the bottom
small in size.
FILTER
Filter is the second of three lters. Filter is used to
reduce clutter; however, too much lter will lower
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·
the probability of detection of small targets.
LIMITER
The third of three lters. The limiter can be ON or
OFF. Turning ON the limiter will remove inter-
ference from other sonar/sounder equipment from
the screen. Objects close to the bottom or on the
bottom may not mark with the limiter ON. The
limiter should only be used when large targets are
of interest.
THRESH
Or threshold. Selections are from 1 to 4. If set
too high, only strong targets will be detected. If
the threshold is set low the smallest of echoes will
be detected. For bottom typing a low threshold
setting is desirable.
DELETE
Delete will remove targets colors weak to strong.
CLIP
Clip is a color stronger then red when selected.
When bottom typing make the following settings.
Select the clip color. Lower the threshold to 1.
Turn ENHANCE to OFF. Turn FILTER to 5. When
over hard bottom adjust the near and far gains so
the bottom just marks in the clip color. All other
bottom types will mark in cooler colors.
BACK
Back or background is the color behind the targets
on the screen. 1=Black, 2=Blue and 3=White.
Black can be used at night and during the day. At
night the black background emits no light and the
targets stand out in ne detail. For nighttime view-
ing it is recommended to lower the brightness of
the text or words on the right of the screen. To dim
the text go to the LOCAL page and increase the
number for TEXT. Blue and White are normally
day time screen. A background color will increase
the contrast making the target much easier to view.
If small targets are of interest try the white back-
ground and select 4 to 6 on PALETTE.
PALETTE
Palette is a target brightness control. When ac-
tivated screen targets will dim from blue to red.
When using lower thresholds 1 or 2 the screen may
be cluttered with targets. Rather then deleting the
lower colors use PALETTE to lower the brightness
of the weaker targets.
1.3.4 LOCAL
Local are general adjustments that are not changed
to often.
UNITS
Select; feet, meters or fathoms.
LANGUAGE
Select the number that corresponds to the language
of preference.
AUDIO
The hand controller has a built in speaker that will
sound when targets are displayed on thescreen.
For additional volume connect an external ampli-
ed speaker to the audio line output jack on the
computer control unit, see section 3.1.6 for more
information. Audio is only activated after the rst
range ring. This will reduce any audio from noise
that is around the boat. Audio is extended to the
corner of the screen. Two types of audio are avail-
able; Fish Alert and Modulation.
FISH ALERT
Fish alert is ideal for purse seining. When sh
schools mark on the screen the alert will sound.
Fish alert is only sensitive to the clip color. Colors
other then clip will not trigger the sh alert. The
size of schools that triggers the alert is determined
by selecting 1 for small schools and 10 for larger
schools. OFF will turn the sh alert off.
MODULATION
Modulation will sound on any size of sh target
and or bottom. By deleting colors or changing
thresholds the sound will follow the change. There
are three selections of the modulation sound, M-1,
M-2 and M-3. Both M-1 and M-2 will have the
sound of the transmit pulse at the beginning of
the receive cycle. Modulation M-1 has a louder
transmit sound then M-2. Modulation M-3 has no
transmit sound, only the sh target will sound and
or bottom will be heard.
VOLUME
Speaker volume selected from 1 to 5.
TEXT
Text will dim all the white lettering and range rings
for night time viewing.
MARKS
Range rings can be turned on or off.
SCREEN
There are four shing sonar screens available.
Screen #1: Full circle sonar
Screen #2: Split Screen sonar on top with bottom
prole on bottom.
Screen #3: Half screen bottom prole only. Can
run with the soundome in the up position
Screen #4: Full screen down sounder.
(Note: Sounder controls Down Sounder settings.)
BRIGHT
Brightness will control the overall intensity of the
display.
TUNING
Adjust frequency for the best target presentation
with minimal noise. This adjustment changes the
frequency of the transmitter and receiver.
ADJUSTMENT:
160kHz, set to 159kHz:
span 156kHz to 162kHz.
110kHz, set to 114kHz:
span 108kHz to 117kHz.
60kHz, set to 60 kHz:
span 57 to 62kHz.
UPDATE
When new programs come available the software
can be installed in the sonar computer board. Select
UPDATE to transfer the new program to the trans-
mit receive motor drive board no the hoist assembly.
Can be used to restore the program if need be.
13
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Part 2:
Installation
2.1 Wheelhouse
Equipment
Check List:
Hand Controller: Part # 64.10342.0
Bulkhead Connector: Part
#78.10389.0
Computer Control Unit: 110VAC
Part #64.09607.0, 220VAC Part
#64.09607.1
Switch Panel: SP395DC
Part #64.01395.0, SP395H
Part #64.02395.0
Monitor
2.1.1 Hand Controller
The SS395 hand controller can be considered the
sonar consolate where all adjustments are made.
Its location should be easily reached when shing.
The hand controller has a 10ft, 3.0 meter cord with
a connector at the end that mates to the bulkhead
connect.
Would you like to have more than one hand con-
troller? Three good locations would be the wheel
house, ying bridge and/or the sh deck. By in-
stalling the hand controller expansion box, part
#64.00342.0, and three bulk head connectors part
#64.10342.0 this will give you full sonar control
from three locations.
2.1.2 Bulkhead Connector Panel
The bulkhead connector panel comes with a 10ft
(3 meter) cable with a connector at the end. This
connector will mate to the computer control unit or
expansion box. To install the bulkhead connector,
Hand Controller
Expansion Box
14
Bulkhead Connector
15
make a hole in the instrument panel 1 3/4 inches
(44.5 mm) in diameter. Attach the bulkhead con-
nector plate to the instrument pnael using the holes
in the four corners.
2.1.3 Computer Control Unit
The computer control unit is designed to t under
the instrument panel. There are three cables in the
wheelhouse that connect to the computer control
unit. Consider the length of these cables before
selecting a lcoation to mount the computer control
unit.
1. The cable from the bulkhead connector panel is
10ft ( 3 meters) long. it must reach the computer
control unit.
2. The AC power cable from the switch panel is
6 ft (1.8 meters) long. It must reach the computer
control unit.
3. The monitor video cable on most monitors is
normally short. Use an extension VGA cable to
reach the computer control unit if needed. (Exten-
sion cable not supplied).
Fasten the computer control unit in place using the
holes in the mounting plate.
2.1.4 Switch Panel
There are two switch panel assemblies, one for
a lead screw hoist and the other for a hydraulic
hoist. Installation is the same for both. The switch
panel does not need to be next to the bulkhead
connector.
Switch panels for both the hydraulic hoist and the
lead screw hoist are the same size. They provide
power to the computer control unit through a 6ft
(1.8 meter) cable. This cable must reach the com-
puter control unit. Make a hole 2.5 X 2.5 inches
(63.5 X 63.5 mm). Pass the wires through the
hole and attach the plate by the four corners to the
instrument panel.
2.1.5 Monitor
Specications:
1. VGA, 640 X 480
2. Horizontal Sync. 31.5 kHz
Computer Control
Lead Screw Hoist
Hydraulic Hoist
16
3. Vertical Sync. 60 Hz
4. Flat Screen or Tube type. Any size.
When selecting a location, keep in mind the fol-
lowing:
1. Select a location where the monitor is in full
view when shing.
2. What voltage is available in the wheelhouse to
run the monitor? A converter may be needed to
supply the correct voltage.
3. If there is a chance the monitor might get wet,
install a splash proof or waterproof monitor.
4. If the monitor is in direct sunlight, install a sun-
light viewable monitor.
5. If the monitor will be ush mounted, select a
monitor with the on/off and adjustment controls
are on the front.
6. Most monitors come with cables. The video
cable is typically 5 ft (1.5 meters) long. The video
cable connects to the computer control unit. If the
video cable is not long enough use a standard VGA
extension cable.
2.1.6 Audio Line Output
Below the VGA connector on the computer control
unit is a mini jack. This jack will supply the audio
line voltage to an external amplier that is con-
nected to the speaker. Speakers with ampliers are
the type used as external speakers on computers.
The mini jack on the SS395 is compatible with the
computer type speakers.
WARNING: Do not connect speakers directly.
In doing so, the audio circuit will be damaged,
not covered by warranty. Only use speakers
with built in amplier like the type used on
computers.
2.2 Seachest
Installation
Checklist:
How much room is needed?
Seachest location.
Seachest Specications.
17
2.2.1 How much room is needed?
There are three measurements needed to determine
the vertical height of the hull unit, seachest and
hoist assembly together.
1. Depth of keel at the location of the seachest.
The overall vertical height is the total length
of the seachest plus the hoist assembly on top. If
the boat has a keel then part of the seachest will
pass through the hull to the bottom of the keel.
This distance will reduce the vertical height needed
inside the boat.
2. Seachest length.
The seachest must be long enough for the
soundom to t inside plus 1 1/2 (38mm) for protec-
tion when not in use. This becomes the minimum
length. the minimum length is different for the
following models:
Model: Minimum Length
SS395-E-160 21 in (53.3 cm)
SS395-H-160 24 in (61 cm)
SS395-E-110 22.5 in (57.2 cm)
SS395-H-110 25.5 in (67.8 cm)
SS395-E-60 22.5 in (57.2 cm)
SS395-H-60 29.5 in (74.9 cm)
3. Hoist length
The vertical length is different for the fol-
lowing models:
Model: Minimum Length
SS395-E-160 25.75 in (65.5 cm)
SS395-H-160 33 in (83.8 cm)
SS395-E-110 28.75 in (73 cm)
SS395-H-110 33 in (83.8 cm)
SS395-E-60 28.75 in (73 cm)
SS395-H-60 33 in (83.8 cm)
2.2.2 Seachest Location
For the best sonar performance avoid items in
front of the seachest that can create bubbles or
turbulence. Items such as zinc plates, cooling pipes,
sounder housings, water intakes or discharge ports
should NOT be in front of the seachest.
18
Avoid installing the seachest near other sounding
equipment. Down sounders should be behind the
seachest. Other sonars should be on the opposite
side of the keel.
Select a location 1/3 to 1/2 of the ship’s overall
length back from the bow. On lighter boats where
the bow is likely to come out of the water at times,
moving the seachest closer to the half length is
recommended.
Athwart Vessel Location:
1. Installation through the keel is optimum,
center line of vessel roll.
2. Along side the keel and 1/2 in (13 mm)
up from the keel is a very good location, vessel
roll is minimal. The keel also adds strength to the
seachest as it protrudes through the hull. Fair the
seachest to the keel. Alongside the keel will help
keep debris from snagging.
3. If next to the keep is impossible, locate
the seachest within 40 in (1 meter) from the keel.
The bottom of the seachest must extend down to
1/2 in (33mm) up from the keel. Fair the seachest
for-and-aft but not to the hull. If faired to the hull,
bubbles will travel down the taper to the soundome.
To deect debris a plate cut at a 45 degree angle
to the hull should be attached to the leading and
trailing edge of the fairing. The plate will deect
debris and not catch on the seachest.
2.2.3 Seachest Specications
The SS395, depending on the model, will have a 6
in soundome or an 8 in soundome. The size of the
soundome will determine the pipe and the ange
specications. Use one of the following drawings
when fabricating the seachest at the boat yard.
Steel and wooden boats use steel.Aluminum boats
use aluminum. Fiberglass boats use berglass.
Fiberglass seachest with ange can be ordered
from WESMAR. (6 in part #62.04327.0 or 8 in
part #62.04329.0)
6-inch Seachest
1. Use 6-inch schedule 80 steel pipe
(5.761 Id nominal)
2. Length between minimum length (3.2.1)
and 40 in (1.2 m)
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3. Paint inside with same bottom paint as hull.
8-inch seachest
1. use 8-inch Schedule 80 steel pipe
(7.625 in ID nominal)
2. Length between minimum (3.2.1)
and 40 in (1.2 m)
3. Paint inside with same bottom paint as hull.
2.3 Electrical Hoist
Installation
Note: The SS395 can be ordered with an electrical
hoist or a hydraulic hoist. Section 3.3 will cover
the electrical hoist with 3.6 will cover the hydraulic
hoist.
Checlist:
Calculate the length of the
soundome tube
Check soundome clearance
inside seachest
Fasten the soundome to the
soundome tube
Assemble hoist
Attach hoist to seachest
2.3.1 Calculate Lenth Of Soundome
Tube
There are two electrical hoist systems. One for the
6 in soundome and another for the 8 in soundome.
The difference between the two is the size of the
ange and the total travel.
1. 6 in soundome: measure the length of the
seachest and add 4 in (10 cm)
2. 8 in soundome: measure the length of the
seachest and add 5.5 in (14 cm)
When the proper length of the soundome tube is
determined, measure from the threaded end, mark
the length and cut. File the rough edges.
2.3.2 Check soundome clearance in
side seachest
The soundome should not fit tight inside the
20
seachest. This can place addition strain on the
hoist motor and damage it. Also, if the insides of
the seachest start to rust the dome may jam and
possible damage to the hoist motor may be the
result. A loose tting soundome will be subject to
vibration reducing sonar performance.
The SS395 soundome must t the seachest with a
clearance no greater than 1/16 in (1.6 mm). Both
the 6 in and 8 in ABS soundomes have ns or ribs
on the side of the dome. The ns can be led down
for the correct t.
When checking the soundome, do not handle the
soundome by the soundome cable. Hold the dome
by the neck.
2.3.3 Fasten the soundome to
the soundome tube
1. Thread the jam nut into the soundome.
2. Wrap teon tape around the threads of the soun-
dome tube. WARNING: only use Teon tape
on the threads of the soundome tube. Chemical
thread sealant will damage the ABS threads of the
soundome.
3. Run the soundome cable all the way through the
soundome tube, starting from the threaded end.
Have a helper hold the soundome at the same time
rotate the soundome tube. Be careful not to cross
threads. Tighten by hand without tools.
4. Tighten the jam nut using a wrench for a snug
t.
5. To protect the soundome cable from chang on
the end of the soundome tube, a urethane strain
relief is supplied. Cut the urethane strain relief
down one side. Open the cut and push the soun-
dome cable into the strain relief. Slide the strain
relief down the cable and into the open end of the
soundome tube.
2.3.4 Asemble Hoist
1. Remove the packing ax from the packing gland
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