Mariners Learning Practice Test 2026 – Your All-in-One Guide to Mastering Maritime Certification!

The pattern tests knowledge of special lights for fishing vessels. When a vessel shows a green light over a white light in a vertical line placed above the sidelights, it is signaling that it is a trawler actively fishing. This two-light arrangement is a deliberate signal to others that gear is deployed and there may be nets or lines extending from the vessel, so vessels should keep clear and take extra caution. The green light sits above the white light to distinguish this activity from standard navigation lights, making the fishing operation immediately recognizable at night. This pattern is specific to trawling, which is why it’s not described by the other options.