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Joystick controls - DEV imca
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Joystick controls

We have received the following information from one of our members, where that member’s vessel suffered a loss of joystick control for no apparent reason, whilst working alongside a rig with a bulk hose connected.

The joystick manufacturer’s engineer visited the vessel, as soon as it returned to port and thoroughly checked out the joystick panel, finding no reason for the failure in the process. Current thinking is that a radio signal caused the control failure. This is not an unknown effect, as another of their vessels found that transmissions from a small UVF portable radio caused the same type of failure. When the portable radio’s aerial was removed, the effect disappeared. Portable telephones are also known to have similar effects on the control equipment.

The member advised that persons should be aware of this potential problem and that, when working alongside an installation, a quick, clean changeover to manual control can be affected before the vessel loses position, should a similar incident occur. They advise that it would also be prudent to practise regular changeover drills, from joystick to manual, if anyone does not already include this as part of a ship’s regular, emergency exercises. The problem does not appear to be specific to any single manufacturer, so they advise that everyone should be made aware of this problem.

Safety Event

Published: 1 July 1999
Download: IMCA SF 04/99

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IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding safetyreports@imca-int.com to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.

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