Make sure you read and heed all state and USCG regs as far as required equipment that must be on board for your boat size, for example, flares, signal devices, fire extinguishers, radio, etc.
And then apply a liberal dose of common sense on TOP of the basic requirements. For many small boats, a marine radio may not be required, but IMO you’d be freaking crazy to be on any big water without having one AND knowing how to use it. Also, just because the regs say one of this and 3 of those, doesn’t mean you can’t go beyond. I would never want to be in big water with only 3 flares.
Also, IMO it would be madness not to take the time to connect the DSC on a modern marine radio if you have a GPS unit that supports it. With DSC, simply pushing the “emergency” button will transmit your GPS location automatically over the VHF without any need for you to do it in the midst of a situation.
Grouse