Base frame
The base frame is a welded steel construction, built up from hollow sections and steel plates to a stiff rigid frame in order to transfer the system forces to the deck structure.
Each frame is provided with all necessary provisions for fastening of relevant accessories such as spring unit, winch and starter box.

Davit arm
The davit arm is built up of a hollow sections and steel plates and provided with all necessary provisions for fastening of relevant accessories such as spring unit, sheaves and remote control parts.
For transportation reasons, the davit arm consists of a base part and an upper part which are easily built together by means of a flange connection.

Spring unit
Each davit will be supplied with a so-called “mechanical stored power unit” which is connected in between the davit arm and base frame.
Dependent on the weight of the rescue boat, this stored power unit comprises a certain amount of disc springs which will be automatically compressed when pivoting in the davit arm.
The spring unit does also incorporate a shock absorbing device in order reduce shock loads when reaching the end position. The rod of the spring unit is made of stainless steel (1.4057)

Winch
The davit will be supplied with an electric driven winch built onto the base frame.
The winch is a standard item and consists of the following main components:
Closed gear casing;
Built-on electric motor;
Single winch drum with a separate section for the remote control wire;
Speed reducer gear (conventional gear train);
Centrifugal brake unit for gravity lowering;
Stop brake of the “dead-man” type;
Manual cranking gear with safety device.

Accessories:
Each davit system will be supplied with the following accessories:

Electric controls
Motor starter built onto the base frame and provided with main switch, push button and “power on” indicator;
Limit switch.

Wire rope
Galvanised non-rotating steel wire rope provided with thimble at one end, and of sufficient length for lowering the rescue boat into the water;

Remote control parts
Stainless steel remote control wire of sufficient length;
Handgrip for operating from within the rescue boat;
Remote control sheaves;
Loose items such as wire rope clips and shackles;

Lashing system
In order to secure the davit arm in stowed position, each davit system will be supplied with an adequate lashing system.

Conservation
Unless agreed otherwise, all steelwork will be shot blasted to SA 2,5 and coated with one layer of 2-component epoxy primer of brand SIGMA. Dry film thickness 60-80 microns.
This conservation is not suitable for outdoor storage for a long period of time.

Optional accessories
The following accessories are to be seen as non-standard but can be supplied optionally:
Stainless steel automatic release hook (off-load type);
Releasable boat cradle for rescue boat c/w lashing straps.