The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________.

Correct Answer: Option A — descending the river

In US river navigation, banks are defined relative to a vessel descending the river (moving with the current toward the sea). A light on the left bank is on the port side when descending. This convention is strictly followed in the USCG Light List for all inland river systems.