weigh anchor (heave in the anchor chain to lift the anchor),
when the anchor is off the bottom it is 'aweigh'
when a vessel is not connected to the (shore) quay or at anchor it is then underway
then when the anchor has been sighted and confirmed clear you get moving, so are making way - i.e. you proceed on your voyage
weigh anchor (heave in the anchor chain to lift the anchor),
when the anchor is off the bottom it is 'aweigh'
when a vessel is not connected to the (shore) quay or at anchor it is then underway
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Agreed that that is the present usage. But I'm not sure that it is the original usage.
The first llegislation on steaming and sailing rules was the 1846 Steam Navigation Act. It was amended in 1848 to cover "Steamers' Lights, to Prevent Collision". The amendment starts "When under Weigh:". Or was it just poor parliamentary drafting?
I think you are needing a historian not a mariner to answer this one, I doubt anyone here dates back to 1846 but you never know ...... there are a few old and bold about.
so - as too original spellings - dont foget that the spelling of the english language was unregulated until it was consolidated early/mid 1800's (I think), accordingly I am afraid I cannot help you regards historical nuances.
If you read some naval history from the 1800's, it does refer to "under-weigh" and is the process of weighing the anchor (which could take several hours in heavy conditions) and setting off. Tends be refer to the beginning of the voyage rather than during the voyage.