The Age of Sail (usually dated as 1571–1862) was a period roughly corresponding to the early modern period in which international trade and naval warfare were dominated by sailing ships, lasting from the 16th to the mid-19th century.
In the rating system of the British Royal Navy used to categorise sailing warships, a first rate was the designation for the largest ships of the line, equivalent to the 'super-dreadnought' of more recent times.
In the rating system of the British Royal Navy used to categorise sailing warships, a fourth-rate was a ship of the line with 46 to 60 guns mounted.
The term gun deck used to refer to a deck aboard a ship that was primarily used for the mounting of cannon to be fired in broadsides.
The rating system of the Royal Navy and its predecessors was used by the British Royal Navy between the beginning of the 17th century and the middle of the 19th century to categorise sailing warships, initially classing them according to their assigned complement of men, and later according to the number of their carriage-mounted guns.
In the rating system of the British Royal Navy used to categorise sailing warships, a second-rate was a ship of the line which by the start of the 18th century mounted 90 to 98 guns on three gun decks; earlier 17th-century second rates had fewer guns and were originally two-deckers or had only partially armed third gun decks.
The "seventy-four" was a type of two-decked sailing ship of the line which nominally carried 74 guns.
A ship of the line was a type of naval warship constructed from the 17th through to the mid-19th century to take part in the naval tactic known as the line of battle, in which two columns of opposing warships would manoeuvre to bring the greatest weight of broadside firepower to bear.
A three-decker was a sailing warship which carried her principal carriage-mounted guns on three fully armed decks.
A two-decker is a sail warship which carried her guns on two fully armed decks.