I. INTRODUCTION
THANK YOU for choosing IST technical buoyancy compensating device (BCD). Only materials
best suited to diving conditions were used to make your new BCD and it was designed and made according to
the highest standard in diving equipment manufacturing so you can have reliable service from it for many
years to come.
Notice: Buoyancy compensating device is considered a PPE (Personal Protective Equipment). All IST
technical BCDs (models: JT-30D, JT-30H, JT-31D, JT-31H, JT-50D, JT-50H, JT-51D, JT-51H, JT-65D
exp. & JT-65H exp.) have been submitted for testing and design validation, and were certified according
to Art. 10 of Directive 89/686/EEC by:
SGS United Kingdom Ltd. (Notified body No. 0120)
202B Worle Parkway,
Weston-super-Mare, BS22 6WA
United Kingdom
The marking on this product represents compliance to the basic health and safety requirements of
Annex II of Directive 89/686/EEC (European standard EN1809: 1997 (Category II PPE)). The number 0120
represents the certifying body SGS UK Ltd., which was entrusted to perform such task for the EC quality
control system according to Art.11 A of Directive 89/686/EEC. The manufacturing process is carried out
under strict supervision by:
IST Sports Corp.
Room A, 6th Floor, No. 6, 345 Lane,
Yang-Kuang Street, Taipei,
Taiwan.
Tel: +886 2 26272516 / Fax: +886 2 26599056
II. GENERAL WARNINGS AND CAUTIONS
Please read and thoroughly understand the content of this owner’s manual in its entirety. If there is anything
unclear on this product’s functions or assembly details, for your safety sake, do not use it and please contact
an authorised IST dealer for assistance.
Do not use this BCD component as part of your scuba diving equipment if you have not received relevant
and proper dive training and certification from a recognised scuba training agency.
This is not a life jacket. It does not guarantee the wearer a head-up floating position at the surface.
Improper use or intentional misuse of this product may cause serious injury or death.
Do not inhale gas from within this BCD
Maximum recommended cylinder capacity (with max. 8” / 203mm diameter) is 1) a single 15-litre tank
for JT-30D, JT-30H, JT-31D & JT-31H, 2) twin 15-litre tanks for JT-50D, JT-50H, JT-51D & JT-51H, 3)
twin 15-litre tanks for JT-65D and JT-65H.
Do not use this BCD as a lift bag. It is not designed for this purpose and may result in uncontrollable ascent,
which could lead to serious injury or even death.
Prior to each dive, fully inflate the BCD and inspect for leakage, damage and proper operation.
1
Before using this BCD in open water, it is highly recommended to familiarise with it features in confined
water first.
Repair or maintenance task of any part or any disassembly of the air cell and power inflator / corrugated
hose assembly must only be performed by an authorised IST dealer. Unauthorised service will render the
warranty void and may cause this product to malfunction.
Do not modify any component on this BCD as it will render the warranty void and the product may not
function properly and safely.
Temperature range for using IST BCD:
Air -20℃~ 50℃ / -4℉ ~ 122℉
Water -2℃ ~ 40℃ / 28℉ ~ 104℉
Definition of WARNING, CAUTION and ATTENTION:
WARNING Indicates a situation that, if not avoided, will
result in serious injury or death
CAUTION Indicates a situation that, if not avoided, may
result in serious injury or death.
ATTENTION Indicates a situation that, if not avoided, may
result in minor or moderate injury or damage
to your scuba equipment.
III. BCD features
IST technical diving equipment is modular and so our BCDs come in various combinations. Below is a quick
reference table of for our standard products and some explanations of their main features:
Basic harness Deluxe harness
with single tank
adaptor
JT-30H *
JT-31H **
JT-40H *
JT-41H **
JT-30D *
JT-31D **
JT-40D *
JT-41D **
with twin tank
steel bands
JT-50H *
JT-51H **
JT-65H *
JT-50D*
JT-51D **
JT-65D *
* With stainless steel back plate
** With aluminium back plate
*** Depending on your local / regional distributor, your
BCD package may contain a different combination of
components to what is described within. Please check your
nearest authorized IST retailer if you have question with
regard to your equipment.
2
