The KRANSKAN™ indicator is a dedicated safety device developed by Hook Marine to provide warning of hazardous conditions during marine crane operations.

Hook Marine recognised the need for such a device, given that many boats are not fitted with effective inclinometers to warn of the approach of angles of heel at which the cargo might shift, with resulting loss of stability. Load indicators should also be fitted to protect the cranes and their mountings from overload.

To understand how safe you are when lifting at sea, you need to know how heavy the load is and how far the vessel is heeling. The KRANSKAN™ indicator measures these two parameters, giving an audible and visible indication of the safety margins at the crane controls.

Coloured lights and a two-tone alarm on the KRANSKAN™ indicator warn the crane operator of approach to a pre-determined maximum load moment for the crane or maximum angle of heel for the boat.

The crane operator is therefore fully informed of the twin hazards of overload and over-heel as the lift progresses.

The Kranskan™ indicator MK5 RF variant

Work carried out on workboat cranes illustrated the need for safety equipment to be fitted to those cranes in order to comply with UK Marine Regulations. To this end Hook Marine has adapted the Kranskan for these situations.

The MK5 RF variant has been designed for marine cranes with continuous slewing where the operator sits on the crane superstructure. The solid-state inclinometer is housed in a separate enclosure to the vessel in order to give the true heel of the angle.