Tuesday, June 5, 2012

Surveying the Seabed

NIWA's Mahanga Bay Aquaculture Centre

There are 3 rafts out in Mahanga Bay. Twice a year the guys out at the Aquaculture Facility need to survey the seabed to see what's there. Phil and Johnny have a line that they survey from the raft to the shore.  They lay a 50 cm quadrant on the sea floor, count up all they see, then turn the quadrant over- ending up with a metre area surveyed. They use a pencil and a special clipboard to record the data.

These rafts used to have cages below them with fish
A cold pair! Phil and Johnny surveying.
Hanging on the raft! Graeme let me have a go
driving the boat in the bay.

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