Lost, as a boat may be? (2,3)

I believe the answer is:

at sea

I believe this is a double definition.

'lost' is the first definition.
(both can mean confused or in trouble)

'as a boat may be?' is the second definition.

(Other definitions for at sea that I've seen before include "disorientated" , "Confused, bewildered" , "Confused, uncertain" , "in the Med?" , "In confusion" .)

I've seen this clue in The Telegraph.

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