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Manual Slewing Davit : SCM 14-10 3.5 LR (rc)
 
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  March 11th, 2010
Ned-Deck Marine Vietnam; The Story
This article about the story from Ned-Deck Marine Vietnam highlights the story from NDM in the international maritime arena. Arnout IJzermans, Managing Director NDM Vietnam, explains the business and how NDM successfully set foot outside the Netherlands.
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The NED-DECK MARINE manual slewing davits have been designed for long time operation under adverse and extreme conditions in a highly corrosive marine environment.
The manual slewing davits of the SCM-LR series are so-called “plug-in and play units” all guaranteeing easy installation on board.

The SCM-LR davit is a freestanding deck mounted davit consisting of a davit arm, column and winch.
The system is suitable for safe and efficient handling of a fully manned rescue boat or life raft against unfavourable conditions of trim of up to 10 degrees and a list of up to 20 degrees either way.

Slewing out the davit arm is realised manually by means of a crank handle whilst lowering is realised by means of gravity.

The lowering procedure can be controlled in two ways, either by means of a remote control wire from within the rescue boat/life raft or by lifting the brake handle of the winch directly.

Recovery of the rescue boat with its crew is realised by using the electric driven winch.
In case of a power failure or malfunctioning of the electric system, hoisting can also be done manually by using the crank handle of the winch.

The normal launching procedure - in case of an emergency - is to lower the rescue boat first and the life raft(s) afterwards. This in order to prevent that the rescue boat will be launched on top of the life raft.
For this purpose, and in order to save valuable time, the winch has been executed with a so-called “Quick-Return Unit” for easy and fast retrieval of the empty hook.

As soon as the rescue boat has become waterborne, the empty hook can be recovered rapidly by using the hand crank of this quick-return unit and by pulling the hook inboard by means of the jockey pulley lines which are attached to the davit arm and the wire rope.

Since the safe working load and outreach of the davit are normally determined by the size of the rescue boat or life raft, NED-DECK MARINE have chosen for a limited range of standard designs which can be adapted to some extent in order to meet individual and specific needs.

With the exception of the manual slewing mode with regard to rescue boat handling, the SCM-LR series meets the latest IMO/SOLAS requirements and LSA Code as well as the European Council Directive 96/98 EC on Marine Equipment (M.E.D.).
In those cases where manual slewing is not allowed a hydraulic slewing davit of the SCH-LR series can be used as an alternative.

 
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