Top of the tide.... 2 hours either side and you should have water.
In the narrow, twisting places take it slow.
Someone one the bow doesn't help because the water isn't clear enough and comes up so rapidly you aren't stopping anyway..
All the way is sand or mud so slow going with a full keel trawler let's you back off and feel your way to the channel.
If you have assistance towing, that area should have timely response so a gentle grounding can be corrected quickly in most cases.
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