1. Change frequency.

Preferably to the legal one you should have been using in the first place that
we know is being monitored.

2. Use relaying to get messages through.

Or ...

The International Maritime Organization officially phased out Morse code for
ships
in peril, replacing it with the high-tech Global Maritime Distress and
Safety System.

If HF isn't supporting voice propagation, to what frequency would you
suggest changing?

If you were ever out in that situation LEGALLY, you would know the answer,
because you are supposed to know the frequencies before you leave shore.

The International Maritime Organization officially phased out Morse code
for ships in peril, replacing it with the high-tech Global Maritime Distress and

Safety System.

Satellites and GPS. To HF as microphones are to morse code keys. To HF as
telephones are to telegraph systems. To HF as cars are to horses and camels.