Launch and Recovery System Hire
Description
The Launch and Recovery System (LARS), available for hire, is a robust diver deployment solution designed with safety, reliability, and flexibility in mind. The system includes an adjustable A-frame, two hydraulically-controlled man-riding winches, a diving cage, a control box, and a clump weight, all providing an efficient and compact way to deploy and retrieve divers. Certified by Lloyd’s Register of Shipping, the LARS adheres to Lloyd’s Rules for Lifting Appliances, ensuring it meets rigorous operational standards. Each system comes with a comprehensive certification data pack for assured safety and compliance.
The two-man dive basket within the system has a Safe Working Load (SWL) of 400kg and operates at depths of up to 50m. Built from durable stainless steel with non-slip grating and handholds, it includes emergency recovery features and diver access gates for ease of entry and exit. The basket’s design incorporates a maximum capacity of 1000kg, with ample space for tools and necessary equipment. For enhanced safety during operations, the system includes a spotlight on the A-frame and an over-travel safety mechanism to prevent accidental basket overload.
The clump weight has an SWL of 1000kg, acting as both a stabilizing and emergency retrieval component. In case of mechanical failure, it serves as a backup means for basket recovery. The A-frame includes a main central sheave wheel for controlled lifting and lowering, while an 8” snatch block routes the clump weight wire along the crossbeam, optimizing stability during deployment.
Constructed for durability, the system’s base skid is made from channel section steel, coated with offshore-grade paint for corrosion resistance, and topped with a non-slip grating for added safety. Removable steel safety gates aid in transport, making the system easy to move and set up. Hydraulic man-riding winches powered by efficient gear motors provide smooth operation, with brake valves, internal safety brakes, and overrun clutches for precision control. Stainless steel piping and non-rotational, crush-resistant wires help prevent wear and ensure the winches maintain safe and reliable performance, with line speeds up to 20m/min.
Overall, this heavy-duty LARS package combines strength, safety, and efficient operation for challenging underwater environments, all while remaining easy to transport, install, and store.
Certification & Standards
Surveyed by Lloyd’s Register of Shipping for diver operations.
Designed according to Lloyd’s Rules for Lifting Appliances.
Dive Basket
Two-man capacity with SWL of 400kg and operational depth up to 50m.
Constructed from stainless steel, with non-slip grating and handholds.
Fitted with emergency recovery shackle and dual access gates for diver entry/exit.
Clump Weight
SWL of 1000kg with a tare weight of 200kg, tested to 1.5x SWL.
Serves as a backup means for basket recovery during mechanical failure.
Safety & Efficiency Features
Integrated spotlight and over-travel safety system to prevent basket overload.
Hydraulic winches with brake and overrun clutch systems for smooth operation.
Designed for durability with stainless steel piping and non-rotational, crush-resistant wires.
Heavy-Duty Construction
A-frame with main central sheave wheel and clump weight winch wire routed through an 8” snatch block.
Base skid with non-slip grating and a removable steel safety gate for transport ease.
Offshore-grade paint for corrosion resistance.
LARS
Survey authority: Lloyds Register of Shipping (Diver/operational)
Design code: Lloyds Rules for Lifting Appliances (Diver/operational)
Safe Working Load (SWL) of A-frame arms:
Primary sheave: 800kg + 200kg shared on outer arms
Secondary system: 1000kg
Note: primary and secondary loads are not combined
Test loads: system load tested in accordance with Lloyd’s Rules for Lifting
Appliances Chapter 9 Section 1
Test load primary:
Static: 1.5 x 800kg = 1200kg
Functional: 1.25 x 800kg = 1000kg
Break: 1.1 x 800kg = 880kg
Test load secondary system:
Static: 1.5 x 1000kg = 1500kg
Functional: 1.25 x 1000kg = 1250kg
Break: 1.1 x 1000kg = 1100kg
Operational Sea State: 2m significant wave Beaufort 5
Design temperature: -10°C (operational)
Offlead angle: 10°
Depth capability: 75m
Overall dimensions:
Operational: L3602 x W1755 x H3200mm
Transport mode: L3649 x W1755 x H2076mm
Power supply: 415V @ 50Hz or 440/460V @ 60Hz (to meet clients requirements)
Oil capacity: 2 x 200 litre
Oil delivery: 100 litres/min
Hydraulic working pressure: 95 Bar
Main lift wire:
Diameter: 13mm
Length: 75m EWL, non-rotational
Clump weight wire:
Diameter: 13mm
Length: 150m EWL, non-rotational
Dive Basket
Survey authority: Lloyds Register of Shipping
Design code: Lloyds Rules for Lifting Appliances
Weights:
Gross: 800kg
SWL: 400kg
Tare: 400kg
Test weight: 1.5 x gross = 1200kg
Operational water depth: 50m
Maximum weight in water: 638kg approx. (depending on payload)
Design temp: -10°C
Material: Stainless steel
Clump Weight
Survey authority: Lloyds Register of Shipping
Design code: Lloyds Rules for Lifting Appliances
SWL: 1000kg
Tare: 200kg
Test weight: 1.5 x gross = 1500kg
Design temperature: - 10°C
Component Details
Base Skid Detail:
Constructed of channel section steel
Base frame is covered with a non-slip grating
Fitted with steel safety gate, which can be removed if required to aid transportation
Paint to offshore specification
Divers Deployment A-Frame Detail:
Fitted with a main central sheave wheel, where the lift wire is positioned for lifting and lowering the dive basket
The clump weight winch wire is routed via an 8” diameter snatch block which is located upon the A-frame cross beam
Head of the A-frame incorporates a spotlight for illumination during hours
of darkness and an over-travel safety interlock system to protect against the basket being hoisted into the pulley sheave wheel
Paint to offshore specification
Clump Weight and Basket Winches
2 x Hydraulic man-riding winches
Powered by high efficiency gear motors designed specifically for application and to provide smooth operation
Motor torque is transmitted and multiplied by efficient gear train within the winch drums
All rotating components are supported by high anti-friction bearings and run in oil to minimise friction
Load control system is maintained by a brake valve, which is backed up by an internal multi-disc hydraulic release safety brake. Additionally an overrun clutch permits a free rotation through the brake in the hoisting direction with immediate lock-up when the hoisting operation is completed
Both winches are fitted with non-rotational wire ropes, which are crush resistant and designed to reduce sheave wear
Integrally piped in stainless steel to the hydraulic control valve block via quick connects, which in turn are connected directly to the supply and return hydraulic supplies
Line speed: 20m/min
Clump weight winch SWL: 500kg
Basket winch SWL: 800kg
Two-Man Dive Basket and Clump Weight
The dive basket can carry two fully equipped air divers with tools up to a maximum of 1000kg total
1.2m x 1.2m Diving cage with overhead protective frame
Emergency recovery shackle and master link
Recess for on-board cylinder (not supplied)
2 x Diver access gates on both sides of the cage
Hand hold points are situated within the cage and the base of the basket is fitted with a non-slip, corrosion proof grating
The main structure of the basket is made up of heavy duty tubular section stainless steel
The main lift wire connection point incorporates two additional emergency lift points
Clump weight beam on wire guides are provided to minimise lateral movement of the diver basket during deployment, the clump weight arrangement employed also provides a secondary or back-up means of diver basket recovery in the event of mechanical failure or breakdown and is rated to 1000kg total