Sentence 1: Bill was on boating while on holiday. 
 Sentence 3: The coastguard had to come and tow him back to land 
 Sentence 4:  The coastguard smelled alcohol on Bill and arrested him 
 Sentence 5:  Bill never drank while boating again! 
 Option 1: Bill had been drinking pretty heavily when his boat ran out of gas. 
 Option 2: He had a helmsman steering his boat, so Bill could relax in the hold.