San Diego sailor's......

greeting to Every Sailor in the "San Diego" sub op area....... :)(: i do hope that you-all keep your depth sounders pinging while you play.... no! well, please find below a little ditty right out of the board of inquiry record's for the sinking of the Japanese ship; "Ehime-Maru" by an SSN just off Pearl Harbor on or about the 2-9-2001..... and don't say that i hadn't told you before that stuff like this can and does happen. stuff that mostly never gets into public record........ happy sailing, fiver..... ************************************* (quote from testimony given by) Rear Admiral Charles Henry Griffiths, commander of submarine group nine. 5-5-2001...... Q And, sir, why is TMA so important when you're coming to periscope depth? A Well, in this scenario where safety of ship is your primary consideration. TMA is fund mentally important to ensure you're not so close to a surface contact that there will be a danger of collision when you come to periscope depth at first sea realm, or come (up) underneath them. Coming to periscope depth is inherently dangerous because until you've had the additional sensors above the water line, such as visual sensors through the periscope, electronic sensors, you have only your sonar to have determined whether or not there are contacts present. And sonar alone is not -- does not give you complete assurance that there are no surface contacts there. For example, if you have a sailboat and a fiberglass hull who has no machinery operating, that boat may be creating zero acoustic energy that your sonar would ever hear. (TMA = target motion analysis) ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour