Kayaker n. : One who uses a kayak.

Example:
How long for a Kayaker to cross a stream with a current it they aim at the target throughout?

Taxonomy
kayaks, boats, paddler, hull, design, Sea kayaks, whitewater kayaks, recreational kayaks, stability, secondary stability, whitewater, paddle, Surf Kayaks, racing, fishing, shape, Sit-on-top kayaks, cockpit.

Defination from the web:
Kayaker) Jump to: navigation, search. Look up kayak in Wiktionary, the free dictionary. For other uses, see Kayak (disambiguation) ... A special type of kayak using pedals allows the kayaker to propel the vessel with a propeller or underwater "flippers" attached to pedals in the ...