2 ms·

- EPIRB = Fixed unit, installed on a boat. Water activated. - ELT = Fixed unit, installed on an airplane. G-force activated. - PLB = Handheld unit for individ

by tjohns 7y ago

- EPIRB = Fixed unit, installed on a boat. Water activated. - ELT = Fixed unit, installed on an airplane. G-force activated. - PLB = Handheld unit for individuals. Manually activated only. They're all the same technology, but the form factor differs depending on which term you refer to them by.