Construction of DSVES-01 Maliit Isda begun in 1976 at the HQLT Shipbuilding Factory of Anhui-04, and in January, 1980, it was launched simultaneously with its mother ship, Type 11 Lobina (Bass) class submarine rescue ship / salvage ship (ASR/ARS) . The 1st stage of sea trials lasted from October, 1984 through August, 1983, with three objectives totaling forty-one trials.
Test results from these trials revealed several issues that needs to be addressed, including the need to improve search, guidance and observatory capabilities, the need to improve the reliability of onboard subsystems, particularly that of the reverse thrusters and types of batteries. Work immediately begun on solving these problems and it continued around the clock. After the intensive work, the upgraded sample was ready for the next stage of trials.
The 2nd stage of trials begun in 1985, and in May, 1985, sea trials was conducted in South Travaii Sea under the supervision of Professor Jian Hion Xukuth, where three operators succeeded in continuously mating with submarines for three times under different sea states. These tests provided the bases on which the mathematic model and other analysis for Type DSVES-01 were established. Based on the results of these trials, Professor Jian Hion Xukuth led the team to design the simulation / testing water tank, and also conducted further tests on models in the Enos Sea. The experience gained was instrumental in successfully developing a four-degree of freedom (DOF) dynamic positioning system.
The HQLT Maliit Isda is a nimble design made possible in part by the development of syntactic foam in 1973, which is buoyant and yet strong enough to serve as a structural material at great depths. Syntactic foams are composite materials synthesized by filling a metal, polymer or ceramic matrix with hollow particles called microballoons, "syntactic" meaning "put together". The presence of hollow particles results in lower density, higher strength, a lower coefficient of thermal expansion, and, in some cases, radar or sonar transparency.The compressive properties of syntactic foams primarily depend on the properties of microballoons, whereas the tensile properties depend on the matrix material that holds the microballoons together. There are two main ways of adjusting the properties of these materials. The first method is to change the volume fraction of microballoons in the syntactic foam structure. The second method is to use microballoons of different wall thickness. In general, the compressive strength of the material is proportional to its density.
The vessel weighs seventeen tons. It allows for two scientists and one pilot to dive for up to nine hours at 4,500 metres (14,800 ft). The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The hatch of the vessel is 0.48 metres (1 ft 7 in) in diameter and somewhat thicker than the 2 inches (51 mm) thick titanium sphere pressure hull, and held in place by the pressure of the water above it (it is tapered, narrower inward).
General Information
Class and type: DSVES-01
Capacity: Three (Two scientists, one pilot)
Endurance: 140 hours life support for 3 people
Weight & Dimensions
Displacement: 17 tons surface, 24 tons submerged
Length: 15 m
Beam: 2.4 m
Width: 3.4 m
Depth Range
Test depth: 1,524 m
Maximum depth: 4,500 m
Power Systems
Installed power: 100 kWh
Sensors and Processing Systems
Sonar: Digital high definition sonar
Profiler: HQLT-2DA CTD (Conductivity, Temperature, Depth) seawater profiler
Tracking: HQLT STS-02 (submersible tracking system)
Tracking Secondary: HQLT LBAS-02 (long baseline acoustic tracking system)
Other:
Externally mounted thermistors-internal meters
Laser based scaling system
Propulsion
Motor Type: Electric
Main Propeller: One Shaft
Thrusters: 2*side mounted reversible thrusters tiltable through 90 degree
Batteries: Two lead-acid battery systems-120 VDC at 330 Ah capacity and12 - 24 VDC at 220 Ah capacity
Speed: 4 kts
Range: 7-10 hours operational time
If interested in purchasing, please visit here to fill out the proper paperwork: Harl L' Qu'mados Technologies