The UK Marine Accident Investigation Department (MAIB) has revealed a Security flyer referring to a collision between two vessels brought on by lack of propulsion management, reviews IMCA.
What occurred
A fishing vessel misplaced management of its propulsion system whereas berthing, and collided with a harbour tug within the port of Hull, UK. The vessel’s bulbous bow breached tug’s hull and starboard gas tank throughout the collision, inflicting the tug to partially sink and leading to roughly 7,000 litres of marine diesel oil spilling into the dock. The fishing vessel was not broken. There have been no accidents.
The fishing vessel’s propulsion system comprised a single most important engine driving a controllable pitch propeller by way of a clutch and gearbox. The propulsion system might be operated from a number of stations situated within the wheelhouse and from the engine management room (ECR). The lack of management occurred when the propulsion management was handed from the bridge to the ECR with the clutch engaged. On the time of the handover, the bridge propeller pitch lever was set at zero, whereas the ECR’s propeller pitch lever was set at 100% forward. The propeller pitch routinely superior when management was accepted within the ECR, inflicting the fishing vessel to maneuver ahead on the berth.
What went flawed
The pitch levers for the fishing vessel’s propulsion management system weren’t synchronized between the bridge and engine management room when management was transferred. The propulsion management system was not fitted with interlocks to stop this from occurring – these weren’t required;
The fishing vessel’s engineer had not checked that the engine room pitch lever was matched to the bridge pitch setting when management was handed from the bridge to the engine room;
There was no process for management changeover.
Classes
The MAIB report drew the next classes:
The interlocks, which had been non-compulsory, might be retrofitted by the engine producer;
Sturdy shipboard practices are important to keep up propulsion management throughout handover, no matter whether or not system interlocks are fitted. Documented procedures ought to comprise a requirement for the operator of the sending station and the receiving station to verify that propulsion methods pitch settings are synchronized on the time of switch.
To cut back the chance of propulsion thrust being utilized inadvertently whereas alongside the MAIB means that it’s advisable to declutch engines earlier than switch of management.
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Supply: IMCA
