Για να προσθέσω στις γνώσεις μας (αν και όχι στη συγκεκριμένη προβληματική) υπάρχει και η παρακάτω σημασία του marshal:
Από το OED:
b. Naut. An official on board ship who superintends the carrying out of punishments. Obs.
1627 Capt. Smith Seaman's Gram. viii. 35 The Marshall is to punish offenders, and to see iustice executed according to directions; as ducking at the yards arme [etc.]. | Ibid. xv. 73 In English ships they seldome vse any Marshall.
Από βιβλίο:
Also serving aboard the Santa Maria was the alguazil de la armada, or marshal of the ship. These men were responsible for maintaining discipline and administering punishment as required.
Peter F. Copeland, "The Sailors of Palos," American History Illustrated, Vol. XXVII, Number 1, March/April 93, pp.