Photo of the Week

We are excited to bring back our Photo of the Week section so stay tuned for new content coming soon! In the meantime, take a look at these fantastic pictures from our teachers.

Determining Latitude – without GPS

April 16, 2019
The horizon sextant is a tool for celestial navigation.

Photo: Heather O'Connell

Greg Gahlinger, H.S.S.T., hydrographic senior survey technician, shared his knowledge of using a horizon sextant. He traveled to Hawaii from San Diego and back using this technology when he was in the navy. Utilizing his Cassens and Plath horizon sextant when there was an atypically sunny day in Tracy Arm allowed me to experience this celestial navigation tool. While the sextant is easy to use, the calculations for placement can be more involved.
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