You are in a keel boat. There are four rowing stations.
Rough seas
Sea is rough, boat is constantly rocking around and the deck is slippery.
Boat movement
After last entity in initiaitve finishes its turn, boat can move forward. Everyone sitting in the rowing station rolls strength check and sum the results. Boat moves RESULT * 20ft forward.
Water is rushing in!
After boat movement, 1d4 hL of water rushes into the boat if the boat has open hole.
Prepare for rowing
You must be standing at the rowing station to use this action. Sit down and take hold of the oar.
While you are in rowing position, you cannot do anything that requires your feet or hands (other than standing up or rowing).
Stand up from the rowing station
Self explanatory