One who opposes a specific ship or shipping in general.
One who objects to ships or shipping deemed offensive, e.g. due to incest, age differences, abusive elements, or power gaps (treating the other partner badly because they have less authority).
A person who likes or tends to express a contradicting viewpoint, especially one who denounces the majority persuasion.
A financial investor who tends to have an opinion of market trends at variance with most others.
Pertaining to or characteristic of a contrarian.