I scuba dive and use an inreach mini 2. Granted the thing does NOT work underwater, I figure any casualty underwater while scuba diving is fatal if you can't recover and two if I'm fucked up at the surface or sweapted out to sea I have an emergency means of batphoning home as PLB. Worse case at least my family has a corpse they can recover.
Also yeah the inreach systems are primarily a PLB they have GPS but that just a standard feature in any PLB made in the last decade.
Also if you want to use it on a plant carrier or any MOLLE webbing you have to get a chain of adapters which imo is fuckin high kikery from Garmin. For me with the underwater case it was underwater case > back clip>slide>MOLLE adapter all separate accessories.
U/W Case and molle adapter
https://www.amazon.com/gp/aw/d/B07JCLL891/ref=ox_sc_act_image_2?smid=A1GIKH3L785S8V&psc=1Retarded required part that doesn't come with the above.
https://www.amazon.com/gp/aw/d/B07JCLL891/ref=ox_sc_act_image_2?smid=A1GIKH3L785S8V&psc=1 