saltwater

Considering buying a Teric but have a couple of questions. I've done searches for saltwater and flying to no avail: Since the Teric uses pressure only to identify a dive, how does it not go into dive mode when an airplane starts a descent, and how does the dive algorithm still maintain...

In a pool... 3/2mm full wetsuit and fins - no weights, full lungs head above water, exhale to drop to eye level; almost neutral? empty Sopras Tek/Sub Compact Lite BC with added pockets from Dive Rite and Dive Gear Express - with 2 lbs in trim pockets, floats; with 4 lbs in trim pockets, sinks...