Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Afterguard" Definition
noun
The members of a yacht's crew who attend to the aft sails.
Source: Wiktionary
The seaman or seamen stationed on the poop or after part of the ship, to attend the after-sails.
In men-of-war, that division of the crew which is stationed on the quarter-deck to work the after-sails, etc., generally composed of ordinary seamen and landsmen who are not required to go aloft; hence, a drudge; one occupying an inferior position.
Source: Century Dictionary
The sailors stationed on the poop or part of a ship.
Source: Merriam-Webster
The decision-making members of a sailboat racing team usually including a helmsman, tactician, and navigator.
Source: Merriam-Webster
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