The Escape from the Fort

You have been condemned for participating in the "Commune" Parisian revolt in 1871 and are about to be deported to the penal colony of New Caledonia. You are being held in a famous fort on the Atlantic coast, a fort surrounded by the sea in the Antioch Strait, used as a temporary prison before deportation. On the day of the big departure, security is relaxed because the guards are busy with preparations for the trip. Therefore, you will have 60 minutes to escape from the fort before the preparations are completed... or you will be forced to board the frigate 'Virginia' which will take you to the penal colony. There are only two ways to leave the fort, aboard the frigate sailing towards the penal colony or aboard the fort's supply boat. Will you manage to escape before being forcibly embarked on the "Virginia"? Your mission: Escape from the fort before the guards return in 60 minutes!