Hi Indalo.. It all depends upon which you think is most important.. Saving Lives or Saving your Radio License. I would think that situation could have merited a Mayday Call, especially if loose rounds were being directed towards aircraft.
Whilst undergoing my FRTOL Exam, the examiner had the scenario that we were flying over a Dis-Masted Yacht, in heavy seas, some miles from land.
This required a Mayday call to be made, as there was a potential for loss of life.
In the UK we are also required to report oil-slicks on the sea, and I have done so, whilst crossing the Severn Estuary... Cardiff was not very busy at that time so lots of details were passed.
Also in the UK the use of Icom Handhelds was not allowed, but now the latest 8.33 KHz Icoms are legal to be used.