It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
As Sailors’ Bodies Are Flown to U.S., Fitzgerald Inquiries Intensify
Japanese officials said on Monday that the accident had occurred nearly an hour earlier than previously believed, and on Tuesday the United States Navy appeared to accept the revised timeline. “We’re not disputing what the Japanese Coast Guard is saying” about the timing of the collision, said Cmdr. Bill Clinton, a spokesman for the Seventh Fleet at the American base in Yokosuka, Japan, south of Tokyo.
originally posted by: Flyingclaydisk
If the Navy says the collision happened at 0230L, then I'm going with the notion the collision happened at 0230L.
“Internet of Ships” tells tale of USS Fitzgerald tragedy—or half of it
Part of the initial suspicion about the data was caused by the reported time of the accident: the collision was widely reported to have occurred at 2:30am local time. But the Japanese Coast Guard reported that the report came long after the actual collision; the Fitzgerald's primary radio room was apparently taken out (though some communications were intact, and the ship was able to respond to communications later), and the Crystal did not report the collision to the Japanese Coast Guard until a full hour after the actual collision at 1:30am. In fact, after initially steering away from the collision, the Crystal did not turn around to render aid to the Fitzgerald for a full half hour, based on track data. (That's not necessarily out of the norm for such a large ship, as it could take miles to slow and turn around.) The US Navy reported the incident as having happened at about 2:20, however.
The Jiji Press news agency reported that the captain of the Crystal said his ship was "sailing in the same direction as the US destroyer and then collided." The collision occurred after the Crystal made an adjustment of course to port (left), steering toward the Fitzgerald's track. Under normal conditions, the crew of the ship showing its starboard side in a meeting situation is supposed to give the right-of-way. The other ship is required by the international "rules of the road" for shipping to maintain a predictable speed and course.
Zone Time (ZT)
Zone time is by far the more precise of the several local times. It is the one that commercial ships and navies use when crossing an ocean—or we all use when sitting at the USCG office taking a license exam! Zone time is determined entirely by the longitude of your vessel at the time you record it. It will differ from UTC by a whole number of hours called the zone description (ZD).
In this time system, the world is divided into 24 time zones , each 15º wide, centered at the standard meridians, which are the longitudes that are multiples of 15, ie 0, 15, 30, 45....165, 180. The borders between time zones thus take place at 7º 30' either side of the standard meridians. The only exceptions are the two zones (ZD = ±12) on either side of the International Date Line, which are only 30 minutes wide (7º 30' of longitude).
If you are keeping zone time (ZT), then you can find UTC from:
UTC = ZT + ZD,
where, again, the ZD is determined by your longitude. This formula is the one that determines (or helps you remember) the sign (±) of the ZD. If your location is slow on UTC, ie any west longitude, then the ZD of that location is +. Eastern longitudes have negative ZDs.
To find the zone description of any particular longitude, round the longitude off to the nearest whole degree, divide by 15, and then round the result off to the nearest whole hour.
Zone time never uses daylight saving time. It is used worldwide. Zone time is never used in civilian matters; it is only for ocean navigation. One could argue that official NOAA Tide and Current Tables are given in what is essentially ZT, but we are more likely to use a reproduction of these, which converts the times to standard times.
Japanese investigators believe the crew of the USS Fitzgerald was in full damage-control mode, stanching the flow of seawater into the destroyer’s compartments, and without reliable communications for as much as an hour after the warship was crippled by its impact with a commercial container ship last week.
That theory of events is still preliminary, the U.S. Naval Institute reports, but Japanese officials believe it explains the movements of both ships in the aftermath of the collision, which killed seven Fitzgerald sailors and wounded three, including the commanding officer, Cdr. Bryce Benson. USNI News explains:
According to the current operational theory of Japanese investigators, the deadly collision between USS Fitzgerald (DDG-62) and the Philippine-flagged merchant ship ACX Crystal knocked out the destroyer’s communications for an hour, while the four-times-larger merchant ship was unaware of what it hit until it doubled back and found the damaged warship, two sources familiar with the ongoing Japanese investigation told USNI News on Wednesday.