On the Champlain Canal, most horn blowing is intended to alert you to the topless women on deck on the next Quebecois sailboat. They often do that around here. It's good to live waterfront on the canal. Fred Tug 44 ---------------------------------------- From: "John & Judy Gill" <jjgill@twojscom.com> Sent: Sunday, January 29, 2012 2:36 PM To: "Tom Barnes" <tomb215@yahoo.com>, "Loop List Great, Loop List" <great-loop@lists.trawlering.com> Subject: Re: GL: Fwd: RE: 4 Whistle / Horn Signal Tom, Like my cousin said, it could be a local signal. Properly the three shore blast whistle / horn signal is given to mean that your vessel is going in reverse AND there are other vessels in the area, as in backing out of a slip. The one long blast is generally used when leaving your fairway and going out into a channel. If everyone in the local area is knows what one long blast immediately followed by three short blast means then it is OK, just confusing outside of the local area? John