The space marine, an archetype of science fiction, is a kind of soldier that operates in outer space or on alien worlds. Historical marines fulfill multiple roles: ship defence, landing parties, and general-purpose high-mobility land deployments that operate within a fixed distance of shore. By analogy, hypothetical space marines would defend spaceships, land on planets and moons, and satisfy rapid-deployment needs throughout space.
An ice boat (often spelled as “iceboat”) is a boat or purpose-built framework similar in functional design to a sail boat but fitted with skis or runners (skates) and designed to run over ice instead of through (liquid) water. Ice yachting is the sport of sailing and racing iceboats. Sail-able ice is known in the sport as “hard water” versus sailing on liquid or “soft” water. A related sport, land sailing, utilizes a configuration with an iceboat-like fuselage or frame equipped with wheels instead of runners. Iceboats commonly used for racing are usually only for one person, but several classes of two-seat and multiple-seat iceboats are more or less common. On some boats, a “side car” can be fitted to take others along for a ride.
Beachcombing is an activity that consists of an individual “combing” (or searching) the beach and the intertidal zone, looking for things of value, interest or utility. A beachcomber is a person who participates in the activity of beachcombing.
Despite these general definitions, beachcombing and beachcomber are words with multiple, but related, meanings that have evolved over time.