A Whale in the Sonar

The whale dove just in front of me, tail in the air as it slid below the surface.

Whale in the Sonar

A humpback whale appears in the sonar at over 100ft below the Nordic Quest

It was a pretty sight, the huge tail silhouetted against the grey water. Satisfied that there was no danger of collision I continued on course. The whale was down, how far down I didn’t know, but well enough that I was not going to hit it.

It was a minute or two later I got the answer. A large return showed up in the sonar display, a system designed to find fish found something considerably larger. A little over  100 feet down the whale passed through the cone of sound. The blob shows no features, in retrospect I wish I had changed the sonar mode to high frequency which gives better resolution, I normally keep it in low frequency while cruising as it has a larger cone.

Still, I did see the whale in the display, something I had kept an eye out for previously, but never actually seen.

About Andrew Cooper

An electrical engineer living and working on Mauna Kea, Hawai'i. Webmaster for the NordicQuest.com website. Sometimes the first mate/deckhand/launch driver/anchor detail/cook/dishwasher and mechanic aboard the Nordic Quest.
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