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Sorry Joel, being a plank-owner for the USS Grapple, I had to correct your statement. The USS Grapple is onsite not the USS Grasp. -Charles > -----Original Message----- > From: Joel Silverstein [SMTP:joelsilverstein@wo*.at*.ne*] > Sent: Tuesday, November 02, 1999 7:38 PM > To: Scaleworks@ao*.co*; kirvine@sa*.ne*; tgunther@co*.co* > Cc: techdiver@aquanaut.com > Subject: Re: EGYPTIAN AIR > > Kev, > > The TWA Flight 800 preliminary dives BEFORE the US Navy ship Grasp arrived > on the scene were done by Police teams. Their bottom times were limited to > 15 minute no-stop limit of the USN air tables. SInce all of the Police > scuba teams are "employees" they need to follow OSHA rules. Scuba can only > be no-stop for commercial work. > > Once the USN Grasp arrived there were two types of dives done. Scuba > reconnaissance, again no-stop dives and then the "hard-hat" sur-d dives. > The sur-D dives were an average of 90 minutes "on-the-bottom" time with > deco using some in-water with most in Surface decompression chambers with > 100% oxygen. > > The 275 fsw depth that Flight 990 is in will require surface supplied > heliox bounces and if extensive work needs to be done it will have to go > to > saturation. > > They can't and wont do this on scuba. > > Regards, > > Joel Silverstein > > > At 04:45 PM 11/2/1999 EST, Scaleworks@ao*.co* wrote: > >In a message dated 99-11-02 15:47:14 EST, kirvine@sa*.ne* writes: > > > ><< > > This is going to be a hard one. Personally , I would not dive unless > > they had some seriously good location equipment to narrow the search. > > > > As far as profiles, this could be done repeatedly if the bt was kept at > > about 18 minutes, and they used scooters, rotating the teams. I still do > > not see much getting done by divers like this in any reasonable amount > > of time. If they find a wreck field, then maybe. > > >> > > > >Based on a presentation given by a Flight 800 NYPD Scuba Team member, > >seriously good location equipment is used. The entire crash area is > mapped > >with side scan sonar, and each individual "hit" is investigated by a > team. > >Police members were not allowed to recover any wreckage on the bottom, > but > >just verify it's identity as wreckage or ocean trash. Surface supplied > Navy > >divers were then sent down to do recovery with proper evidence recovery > >technique, being it was also an FBI investigation. In this methodical > manner, > >I believe 95 - 98 % of the 747 was recovered. Total bottom times were > limited > >to 25 minutes, one dive a day, 115' max depth, however, the Navy worked > round > >the clock, weather permitting. No volunteer divers were used, or asked > for. > >Needless to say, the depth will most likely preclude > >any Police units, and rely on the Navy deep divers. > > > >Kevin > >-- > >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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