I carry two PLB's that cost the same as one EPIRB. I like redundancy. Why bet your life on an EPIRB that's sat in a bracket for years and has likely never been tested?
The PLB 24 hour battery provides more than enough time. SAR has tracked your location and drift rate in about an hour. They can find you even if the PLB stops transmitting. And except in the most
remote waters, a plane or ship will arrive in far less than 24 hours.
A huge advantage of the PLB is that you can wear it around your neck on a lanyard. Too often a bulky EPIRB is left in its bracket inside the boat where it does no good. This happened to Cheeki Rafiki when it capsized and the EPRIB was found unactivated in the overturned boat. Fortunately the crew were wearing PLB's which were tracked.
Yes, a PLB is tied to a person not a vessel - but in the comment field of the PLB database I provide the boat's description,
liferaft information,
documentation and MMSI number, planned
route, and number of people onboard. I update this before each offshore trip (you can do this for an EPIRB too)
Finally, my primary
distress beacon is a
Garmin InReach because it allows two way communication with SAR to provide details of the emergency and plan a rescue. It also results in a faster rescue since SAR doesn't have to spend several hours telephoning names in the EPIRB database trying to confirm that the signal is not a false
alarm (95% are false alarms). My PLB's are a backup.