Hex

BattleTech maps are divided into hexagonal grids. A hex can have two meanings:
 * An individual grid tile', eg "The mech landed in a forest hex"'
 * A unit of distance, eg "The river was only three hexes away". May be measured:
 * In number of hex edges crossed by a straight line between the two points. (for weapon ranges)
 * Literally in number of hexes a unit needs to enter to move from point A to point B. (for unit movement)