Notice breach, having lost bearings (6)

I believe the answer is:

adrift

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'lost bearings' is the definition.
'adrift' can be an answer for 'lost' (thesaurus). I am unsure of the 'bearings' bit.

'notice breach' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'breach' becomes 'rift' (I've seen this in another clue).
'ad'+'rift'='ADRIFT'

'having' is the link.

Can you help me to learn more?

(Other definitions for adrift that I've seen before include "Wandering aimlessly" , "Off course" , "without guidance?" , "Aimlessly floating" , "Unanchored at sea" .)

I've seen this clue in the Sydney Morning Herald.

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