Landlubber (noun)

A person who is not familiar with or skilled at seafaring or boating.

Origin:

Early 17th century: from land + lobber, from lob "to lounge, idle".

Examples:

1. The sailors treated the new recruit like a landlubber, despite his experience on a riverboat.
2. The landlubber was seasick after just a few minutes on the water.
3. The captain was a seasoned sailor and looked down on the landlubber.
4. The landlubber was amazed by the skill and bravery of the sailors.
5. Despite being a landlubber, the traveler was fascinated by the maritime culture.