The `Fish-heads`(sailor-types) are fond of HIFR when there are reports of enemy subs in the area. The frigates like to weave a lot and they canīt do that when you are taking off and landing on their deck. So, they briefley pause to let you hook on then they can resume weaving around whilst you tank-up. Had terrifying night in a Wessex 3 whilst the Makey Learny frigate skipper practiced the concept in the Channel off Portland.
May sound daft but it`s a bloody good technique to have up your sleeve.