Before authorising height work near a satcom dome or radar, in addition to standard isolation, what should the responsible officer confirm regarding nearby vessels or shore installations?

A. Nothing further is needed once the vessel's own equipment is isolated

B. Only the time of day, since RF transmitters are switched off automatically at night

C. Only the weather forecast, unrelated to RF sources

D. Whether other RF sources (e.g. an adjacent vessel's radar, a nearby shore transmitter) could also expose the worker, since isolating only the ship's own equipment does not address external sources

A. Yes, but only if the Master personally watches from the bridge wing

B. No — lone height work should not be authorised regardless of experience or task duration; the Master should direct that the task wait for an observer to be available or be carried out by an alternative method

C. Yes, provided the AB carries a personal locator beacon

D. Yes, given the AB's experience and the short duration of the task

A. Wait for the battery to be replaced before taking any action, with the worker remaining in position

B. Continue observing visually and assume everything is fine since the worker hasn't signalled distress

C. Shout instructions down to the worker and consider that sufficient going forward

D. Treat the loss of communication as a trigger to pause the task and recover the worker, since the absence of an agreed backup method means there is no reliable way to receive an instruction or distress call