I agree with all of Steve's suggestions with a couple of exceptions/clarifications:
26. Coastline - I prefer to retain the current S-32 definition with the exception of ending it as Steve suggests: "synonymously" vice "as synonymous". I do believe the retention of the phrase "Although the terminology of coasts and shores is rather confused" is somewhat important to retain because one could assume without it that coasts and shores are the same which they are not.
29 Current - non-gravitational - I see no need to include this term as it is covered quite adequately by the definition for "current: nontidal. Any CURRENT that is caused by other than TIDE PRODUCING FORCES. See also STREAM."
30. Deep water route centreline - I agree there is no need for including this term.
I am happy with the proposals made by Jerry. I have prepared a new document incorporating Jerry's views and presenting the definitions as amendments to the existing S-32 definition where it exists. Red italic = new text and strikethrough = deleted text. I suggest that we use this document as thye basis for any further discussion.