TWIN DIVE LARS
Containerised Launch & Recovery System for Surface-Oriented Diving
AVAILABLE FOR SALE
Fully self-contained, containerised Launch and Recovery System for the safe deployment and recovery of surface-oriented divers from diving support vessels, platforms or pontoons. Handles a main diving basket for two divers and a dedicated standby/emergency basket for one diver, with an integrated clump-weight system providing true secondary recovery. Rated for Sea State 3, 100 % hydraulic redundancy, compliant with IMCA and DNV-GL standards.
1. Key Features
- True 100 % hydraulic redundancy — two fully independent HPUs, each with its own power source; instant switch-over
- Secondary recovery proven every dive — clump-weight system can raise both fully loaded baskets; no special emergency actions required
- Certified man-riding winches — dual mechanical disc brakes, last-winding protection and counter-balance valves on all three winches
- Rapid mobilisation — only 8.5 t total weight; six ISO container corner fittings for fast installation with standard twist-locks
- Operator-focused design — primary remote control + local panel; intuitive layout
- Safety philosophy under stress — back-up systems integrated into normal operations and continuously verified
2. Capacity
| Item | Capacity | SWL | Weight |
|---|---|---|---|
| Main diving basket | 2 divers + tools | 0.52 t | 345 kg |
| Standby / emergency basket | 1 diver + tools | 0.32 t | 275 kg |
| Clump weight | Secondary recovery | 1.46 t | 600 kg |
| A-frame | Structural | 2.3 t | 760 kg |
| Wire rope – baskets | 2 × 100 m (Ø 13 mm) | — | — |
| Wire rope – clump | 2 × 200 m (Ø 10 mm) | — | — |
Design weight per diver (incl. tools): 200 kg · Maximum total system weight: 8 500 kg
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Overall dimensions (stowed) | 5 315 × 2 940 × 2 806 mm (L × W × H) |
| Total system weight | 8.5 metric tonnes |
| Lifting height | 100 m |
| Lifting speed | 0.25 m/s |
| Operating temperature | –20 °C to +50 °C |
| Sea state rating | Sea State 3 (Hs = 1.6 m) |
| Duty / hoisting factor | 1.2 / 1.7 |
| Off-lead / side-lead | 10° / 10° |
| Installation method | Six ISO container corner fittings + twist-locks |
| Installation positions | Port, starboard or stern |
4. Power Requirements
| Supply | Specification | Purpose |
|---|---|---|
| Main power 1 | 400/440 VAC – 3Ph + PE – 50/60 Hz – 32 A | HPU 1 (Primary) |
| Main power 2 | 400/440 VAC – 3Ph + PE – 50/60 Hz – 32 A | HPU 2 (Backup) |
| Auxiliary | 230 VAC – 50/60 Hz – 16 A | Lighting, counters, controls |
Both HPUs must be connected to independent power sources for full redundancy.
5. Key Safety Features
- Dual independent Hydraulic Power Units
- Dual mechanical disc brakes on every winch (fail-safe)
- Last-winding switches (stops at 3 wraps remaining)
- Line-break valves on A-frame man-riding cylinders
- Hard-wired emergency stops on all control stations
- Secondary recovery via clump-weight system (always available)
- Two certified secondary lifting points on each basket
- Overload protection via main + individual sealed relief valves
6. Compliance & Emergency Life Support
Designed and built in accordance with IMCA D014, D018, D023 and DNV-GL 2.22 (Lifting Appliances).
Both baskets equipped with 50-litre emergency gas cylinder, first- and second-stage regulators, and emergency hose with isolation valve.