Winnipesaukee Forum - View Single Post - More side-scan-sonar images

Diver1111 · 09-07-2008, 08:19 AM

Orion:
Distance needed from target will vary by depth and scan range. Range with this unit is up to 480 wide, left and right combined; Distance at the time I took them of the barge was approx. 50 feet, or a 1:1 scale (50 feet of water, 50 feet away); Get too close and the image will split, giving the illusion that part of an object is standing in the water column itself-this can be very misleading to an interpreter unless they were on board the vessel at the time the image was taken;

Tis:
Stupid has no bearing on your question-if you don't know you don't know-that's not stupid at all;
Answers: Empty Pockets was a 1950's-era cabin cruiser (without the cabin anymore) in 55 feet of water off Diamond; The Lady of the Lake is an 1888-era steamship that was to be scuttled in the lake after being stripped but sank prematurely while being towed out-sitting in Glendale about 400 feet out from NH Marine Patrol HQ; Log field off Meredith-a well known sawmill produced shingles (shakes) way way back on the point in Meredith-logs were floated there for production; The Pile Driver barge sits off Weirs Beach-was once used I am told for viewing a large fireworks display in about 1922-when things got going too many people went to one side at once, the barge listed and sank;

09-07-2008, 08:19 AM	#8
Diver1111 Senior Member Join Date: Jun 2005 Location: Exeter NH Posts: 596 Thanks: 0 Thanked 1,027 Times in 224 Posts	Answer Orion: Distance needed from target will vary by depth and scan range. Range with this unit is up to 480 wide, left and right combined; Distance at the time I took them of the barge was approx. 50 feet, or a 1:1 scale (50 feet of water, 50 feet away); Get too close and the image will split, giving the illusion that part of an object is standing in the water column itself-this can be very misleading to an interpreter unless they were on board the vessel at the time the image was taken; Tis: Stupid has no bearing on your question-if you don't know you don't know-that's not stupid at all; Answers: Empty Pockets was a 1950's-era cabin cruiser (without the cabin anymore) in 55 feet of water off Diamond; The Lady of the Lake is an 1888-era steamship that was to be scuttled in the lake after being stripped but sank prematurely while being towed out-sitting in Glendale about 400 feet out from NH Marine Patrol HQ; Log field off Meredith-a well known sawmill produced shingles (shakes) way way back on the point in Meredith-logs were floated there for production; The Pile Driver barge sits off Weirs Beach-was once used I am told for viewing a large fireworks display in about 1922-when things got going too many people went to one side at once, the barge listed and sank;