Good luck on your course 😀 . I choose not to go with the GPS functions ( i presume your talking about DSC) cause already have one + compare to boat it’s efficiency on radio is more limited. Most larger boat have a 25 W radio with taller and less compromised antenna. Making it better to propagate. As kayaker because we are closer to the water and only use 5w radio your DSC wouldn’t propagate as well. Like they say “jack of all trade master of none” 😀. My recommendation would be to buy a cheaper VHF + add a device like ZOLEO,mini garnin or SPOT. Those are true GPS, make sure your signal is send. My choice of radio was : https://www.amazon.ca/Standard-Horizon-HX300-Handheld-Marine/dp/B00AJVXA5W. It’s been working well, it has nice scanning functions, dual watch. But the big seller for me is it’s ability to be charge by USB. Most kayak group have a charger somewhere and i even leave a cheap bank in my ditch bag in case i would need to recharge in an emergency. Also radio that use AA “ as emergency “ back up have a tendency to propagate less W when you use it with. Less W less far your signal, less bot can hear you 😀