Good points. The 4mph was the average mph from a sports watch using a kayak, so i assume it's 'land 4mph'.
I feel I'm missing something also, Just tickeled my curiosity.
average mph from a sports watch
Using GPS, presumably, in which case the frame of reference is terra firma. If you're doing a ground speed of 4mph directly into a 6kt counterflow, your water speed is 9.5kt
@gbj_tester started
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Good points. The 4mph was the average mph from a sports watch using a kayak, so i assume it's 'land 4mph'.
I feel I'm missing something also, Just tickeled my curiosity.