REB - Radioelektronický boj

Skeptik
Redaktor
Příspěvky: 425
Registrován: 07 úno 2017, 19:59

Re: REB - Radioelektronický boj

Příspěvek od Skeptik » 16 srp 2017, 06:55

Alchymista píše:
15 srp 2017, 23:54
V mierovej dobe rušiť navigačný systém? dajme tomu...
Všimli si to "kapitáni amerických lodí plávajúcich v Čiernom mori" - a nevšimol si to nikto ďalší? Nevšimli si to iné lode alebo lietadlá?
Mělo to hlásit dalších 20 lodí v blízkém okolí té Americké, a všem to mělo ukazovat cca stejnou pozici.

syos
Redaktor
Příspěvky: 490
Registrován: 08 úno 2017, 11:50

Re: REB - Radioelektronický boj

Příspěvek od syos » 16 srp 2017, 09:08

souřadnice/čas
A maritime incident has been reported in the Black Sea in the vicinity of position 44-15.7N, 037-32.9E on June 22, 2017 at 0710 GMT. This incident has not been confirmed. The nature of the incident is reported as GPS interference. Exercise caution when transiting this area.
zpráva pro U.S. Coast Guard Navigation Center, 22.6. 2017, první report
GPS equipment unable to obtain GPS signal intermittently since nearing coast of Novorossiysk, Russia. Now displays HDOP 0.8 accuracy within 100m, but given location is actually 25 nautical miles off; GPS display…
navazující konverzace s Coast Guard
Thank you for your below answer, nevertheless I confirm my GPS equipment is fine.

We run self test few times and all is working good.

I confirm all ships in the area (more than 20 ships) have the same problem.

I personally contacted three of them via VHF, they confirmed the same.

Sometimes, position is correct, sometimes is not.

GPS sometimes looses position or displays inaccurate position (high HDOP).

For few days, GPS gave a position inland (near Gelendyhik aiport) but vessel was actually drifting more than 25 NM from it.

Important: at that time, GPS system considered the position as "Safe within 100m".

See attached.

Then last night, position was correct despite several "lost GPS fixing position" alarm that raised couples seconds only; then signal was back to normal.

Now position is totally wrong again.

See attached pictures that I took on 24 June at 05h45 UTC (30 min ago).

Note: you can also check websites like MarineTraffic and you will probably notice that once in a while all ships in the area are shifting inland next to each other.

I hope this can help.
foto
Obrázek
Obrázek
Obrázek
zdroj
http://maritime-executive.com/editorial ... -black-sea
Oficiální "potvrzení/nepotvrzení" události
https://www.marad.dot.gov/msci/alert/20 ... black-sea/
2017-005A-GPS Interference-Black Sea

A maritime incident has been reported in the Black Sea in the vicinity of position 44-15.7N, 037-32.9E on June 22, 2017 at 0710 GMT. This incident has not been confirmed. The nature of the incident is reported as GPS interference. Exercise caution when transiting this area. Further updates may follow. This alert will automatically expire on July 4, 2017. Reports of GPS degradations, disruptions, and other incidents or anomalies can be made via the U.S. Coast Guard Navigation Center website at: https://www.navcen.uscg.gov/?pageName=gpsUserInput.

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