This proposal simply wants to add an aura to Athenian Marine untis.
Warships Walk Speed and Run Speed increases by 1% for each ~~Marine~~ Champion unit garrisoned into a Warship for a maximum of 35% for Trireme ( 30 units ) and 22% for Bireme ( 20 units ) when the ship is fully garrisoned.
EDIT: Most of hellenic warhips army was composed by hoplites, marines (mostly swordsmen) and archers. While Cretan Archer Mercenary are available also for other civs (like Macedonians and Ptolemies) seems more reasonable to have this aura to affect "Champions" not "Mercenary" units only.