Author Topic: scan at 800khz, the souk on river  (Read 4004 times)

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Offline abraquelebout

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scan at 800khz, the souk on river
« on: October 25, 2010, 07:56:57 AM »
hi, i dive in point find whit towfish on river at 10 m depht 8)
it's the "souk", 3 wreek in 20 m, middle aged wreek, roman column and 16 e siecle potery
a exemple of survey for archeology
yes towfish is workink weel!!!!


Offline Rickard

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Re: scan at 800khz, the souk on river
« Reply #1 on: October 25, 2010, 09:19:27 AM »
Beatiful and thrilling!

It's very interesting to see the range you get at 800 kHz. I would have predicted much shorter range at that frequency and with that length of cable. I assume you used the long towfish cable?

Rickard

Offline Jolly Roger

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Re: scan at 800khz, the souk on river
« Reply #2 on: October 25, 2010, 01:48:10 PM »
Souk?

Are you refferring to the word "market" in arabic? That's what it looks like: A market under water with all sort of stuff to show. Very interesting!

I couldn't go diving today. Nose and throat were closed and the weather was also bad. Next year is another season....

Regards / Harry
YES,......
WE SCAN!

Offline abraquelebout

  • volunteer rescue diver, surfer, publicist
  • Sr. Member
  • ****
  • Joined: Apr 2010
  • Location: france
  • Posts: 263
  • Unit(s): 898, 1198, helix G2
  • Software: deep,,drdepht,reef.
  • Accessories: towfish lowbird /LSS2-hdsi, 60mcable
Re: scan at 800khz, the souk on river
« Reply #3 on: October 25, 2010, 04:45:49 PM »
yes, i use the towfish with 60 m cable.
at 2 or 3 m i take 5 depht under  transducer range (15 m)in 800 khz, and at 3 or 4 meter  10 depht in 455 khz (30 or 40 m range). Picture under 3 meter in 455 seen over exposed
now i begin to make another towfish in composite (carbon and epoxy fiber)
next satuday i want to dive on another point find with the sonar.
i think there's an anciant wreeck ...
there's no visibility for foto, just 1 meter max.
it's the adventure !!! :D


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