may we see too?

what lurks in those shadows...

shadows identify objects that are projecting above the sea floor that we then survey with the more accurate multibeam echo-sounders

in the image above bright yellow indicates a strong echo and dark indicates no or faint echo of the transmitted pulse

the area we worked was really boring and flat, the only interesting thing we saw in almost 300 square nautical miles of sea floor...

was scour marks from the ice scrapping along the bottom during the spring break up

the image above has no features, the squiggly stuff towards the sides is due to a pycnocline bending, or refracting the sound pulse

the pycnocline was due to a large river, the low density freshwater floated above the cold arctic sea water