West Moeris Trireme (Location)
A mobile hostile zone in Faiyum's Lake Moeris.
Your only goal is to kill the captain, so you can simply snipe from afar. Otherwise, this is the rare boat where most of the crew has gone aft, not fore, so you can climb up the prow and backstab the captain in his tent.
Completing any of these death-scenarios completes the location.