The
Mast Wreck, from 18th century.
The
Mast Wreck, from 18th century.
A
part of seafloor near Karlsö, west Gotland.
Nordstjernan,
a drawing.
Nordstjernan,
sonar image.
Nedjan
A
small boat with an outboard engine.
The demonstration of sidescan in Stockholm 7 september 1997