The members of a yacht's crew who attend to the aft sails(noun)
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Use "afterguard" in a sentence
"When his back was turned from them the sailors indulged in grins and back-slappings and other rough demonstrations of their knowledge that the "afterguard" were not on agreeable terms."
"Besides, I understand that every forecastle has its bully, or group of bullies; so this is merely a forecastle matter and no concern of the afterguard."
"In reply, we of the afterguard pointed out that it was our chance for life that was doubled did we but bear with the half-pound ration."