Figure 1: M-AUE and Spar Buoy Pinger.
From: A swarm of autonomous miniature underwater robot drifters for exploring submesoscale ocean dynamics
(a) The 1.5 litre M-AUE in the ocean at an approximate depth of 3 m. (b) The pinger of the GPS-localized spar buoy with a 30 cm ruler at the base for scale.
