The Collaborative International Dictionary of English v.0.48:

Carline \Car"line\, Carling \Car"ling\n. [Cf. F. carlingur, Sp.
   Pg., & It. carlinga.] (Naut.)
   A short timber running lengthwise of a ship, from one
   transverse desk beam to another; also, one of the cross
   timbers that strengthen a hath; -- usually in pl.
   [1913 Webster]