Kayak assistant for the blind

I am looking into the feasibility of an assistive device for a blind kayaker, They would like to set way-points down a river and receive instruction (sound/voice/haptic) to help them steer a safe course. Avoiding obstructions and other craft. They will be with other people so there would be a safety-net (so to speak). It seems at first glance that this system could provide the necessary back-bone to such a system. The only difference is that rather than control motors (like on a boat) we would need instruction. I am a competent Python programmer (with some C/C++) and have been using Raspberry Pi’s and BBB’s for years, so I am not afraid of custom electronics and programming. Do you guys think this would be possible, or am I wasting my time?