See Gibb on Smyth & “Two-six-heave!” upthread:

"UN, deux, trois, an exclamation, or fong, ufed by feamen when hauling the bowlines the greateft effort being made at the laft word. Englifh failors, in the fame manner, call out on this occafion – haul-in – haul -two – haul-belay!"
[Universal Dictionary of the Marine, London, 1769]

Note: Smyth's definition of “Call” is a clone of this volume.