Model JYN65T (tanker version), 6.5 m x 2.3 m x 3.1 m, 36 person, SOLAS, totally enclosed, fire-protected lifeboat, with a self-contained air support system and fiberglass reinforced plastic construction.

The boat and the thing that launches it are inspected as one. SOLAS III/20 and the guidance in MSC.1/Circ.1328 set the pattern: weekly and monthly checks by the crew, and once a year a thorough examination of the launching appliance and an operational test of the on-load release gear by a person certified for it. The release gear is overhauled and the falls are renewed on the longer cycle the same rules prescribe; falls are turned end for end or replaced on condition and on time, whichever comes first, because a fall fails at its hidden end. The engine follows the maker's schedule, with the detail that matters for a boat that sits unused: fuel is drawn off and checked rather than simply topped up, the raw-water impeller is treated as a wear item even without running hours, and the battery is load-tested instead of judged by its resting voltage. Every drill that puts the boat in the water is also the only real test of the recovery arrangement. The tanker version carries two systems the plain boat does not, and both are dated rather than condition-based. The self-contained air support system has pressure vessels that fall due for periodic pressure testing under the rules for pressure equipment, and its regulators, pressure gauges and distribution need checking at the annual examination; a cylinder found below its charge pressure is a failure of the boat, not a minor defect. The water spray self-protection arrangement is tested for coverage, with nozzles cleared and the pump and suction proven - nozzles block with deck debris and salt, and a blocked nozzle is invisible until the system runs. Hatch and window seals, hatch securing gear and seat belts are checked as on any enclosed boat.