From your description, I can guess that any kind of trip is included, including maritime endeavors.
In addition to @JonCuster answer, I would also like to add that for maritime distress situations, you have EPIRB.
EPIRB is, in concept, very similar to PLB but with its own set of requirements:
Must comply with AS/NZ Standard 4280.1 (EPIRB)
Route: Dubai to India (CCU)
Well, I got encouraged by the answers here and asked.
The answer was a "No".
In the airlines defense, I asked for a Hindu meal, which maybe was limited in number.
But, guess what my co-passenger told me.
If you had asked it in your flight from Dubai to some western country they would be more than willing to ...