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Jens, The buoy to which I was referring was large, fat, dark black and had large wings such as an aircraft. Its cable allowed it to glide to shallower depths as the sub cruised deeper. It never actually reached the surface. The cable, although it was used to control how far out and hence how shallow this object was allowed to go, was also used as part of the radio antenna for picking up radio messages. It was tethered out with the use of a hydraulically controlled drum that when turned allowed for the releasing and capture of this buoy. Once arrested within this storage cavity, it rested on large rubber shock mounts. During periods that this buoy was deployed, the ships speed was restricted so as not to loose or damage this buoy. This method when used on a ROV would first deploy the unit to the length of tether intended. Once fully deployed the ROV would perform its intended investigations. To stow the unit back within its housing, it would position itself above the submarine at the extreme end of the deploying interface cable and allow the sub to retrieve it via cable spool mechanism. Once stowed against the seating rubber shock pads, the doors would once again close and the submarine could transit at any speed desired. David Bartsch > Date: Wed, 19 Aug 2009 11:30:17 +0200 > Subject: RE: [PSUBS-MAILIST] Sonar Testing > From: laland@artematrix.org > To: personal_submersibles@psubs.org > > David > > Your mail got me thinking. > > ** This idea is not new but borrowed from the navy as such a buoy system > ** was used at the time but for radio reception. > > I once saw some drawings of an antenna buoy... or actually I do not know > if "buoy" would be the correct word for what I am thinking of: The thing > is, this antenna unit was more like a flat, rectangular towing fish with > stabilizing foils... and it was meant to break surface at a certain > distance behind the submarine. > > Would this be related to what you refered to, and if so, do you have more > information about it? > > Best regards, > Jens Laland > > P.S. Sorry I interrupted your chat with Frank... > > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > Hotmail® is up to 70% faster. Now good news travels really fast. Try it now. |