Thanks for all the good info on the ACK ELT.  I'm thinking maybe I can
disconnect the manual trigger because I now have a Personal Locator
Beacon that would take the place of a manually activated ELT.
I purchased it for a flight to Puerto Rico (Aguadilla and Culebra-
2000').  Transmits on 406 MHz via COSPAS-SARSAT satellite system with
your registered unique, digitally coded distress signal and 121.5 MHz
(SAR homing frequency).
Recessed, waterproof GPS/programming interface (NMEA 0183) transmits GPS
data for even faster response.
Small, lightweight unit can be easily carried in a pack or pocket; small
enough to wear on deck by racers, crew, solo cruisers, kayakers,
climbers, hikers, hunters, pilots or any outdoor enthusiast.
Single, three-position switch for simplicity. Red LED flashing indicates
unit is "ON", Yellow LED flashing indicates test sequence in process,
steady green LED indicates unit has passed full functional test.
Functional test switch for battery power and 406 MHz transmission.
Flat, stainless steel antenna wraps compactly around bottom case for
easy stowage; is easily positioned when needed.
Floats to avoid loss if dropped in water, waterproof to 3.3 ft (1 m).
Wrist lanyard ensures security when hand-held.
Can be stored between -50° C and + 70° C (-58° and +158° F).

I think this is the answer!

Charlie K.