Marespera |
Hello Mrakvampire
I have been a white water rafting guide for several years, having swam and floated across many rivers under numerous kinds of conditions.
From your example your pretty spot on and if the point of the encounter is to just cross from one side to the other what you have works just fine.
To answer your second question, it is generally not possible to swim up stream. However there are certain conditions that amend my answer. Often the speed of the current varies, being slowest near the banks and fastest in the middle. Obstructions can distort the current causing areas of faster moving water as well as calm areas with quite still water. Someone trying to cross could use such river features to aid their crossing. If the goal is to cross a river and land on the bank directly across from where you started, you would have to move at a 45 degree angle to the current. This cancels out the downstream movement of the current, but adds to the length of time needed to cross.