Characteristics and Skills (R201A):

Marksmanship measures your ability to fire all ranged weapons (sidearms, skimmer guns, etc.) except starship guns (which require a special skill instead). The higher your rating, the better you shoot. Ratings range from 0 to 6, if none is given, assume a 0 rating. See R230D for rules on firing ranged weapons.

Hand-to-hand measures your ability in close combat. The higher your rating, the better. Ratings range from 0 to 6. This hand-to-hand rating also determines defense against such attacks, see R230G for details.

Endurance value is a measure of how much damage you can take in combat, and still survive. See R231 for detailed rules about wounds.