Final answer:
John Brown is likely perceived as aggressive and volatile on the ship. Evidence includes his sudden access of fury and violent actions towards a crew member and his willingness to enforce pilot law even at the cost of confrontation.
Step-by-step explanation:
John Brown is likely perceived by others on the ship as aggressive and volatile. One piece of evidence to support this is his sudden access of fury and violent actions towards a crew member. Another piece of evidence is that Brown may be seen as a heroic figure, as he was willing to enforce pilot law even at the cost of confrontation.