Few of the individual survival vests in PHI have the newer beacons. PHI has apparently been reluctant to spend the money on them. When my vest reached its expiration date in August, only the bladder was replaced, with another used one. The beacon was not replaced. Most of these, and
AFAIK all the aircraft beacons, are of the older type which operate on 121.5.
At one time search aircraft would have been launched very quickly. It seems that perhaps SAR aircraft are not available now, and PHI aircraft which might go down might not be able to count on timely rescue.