crosstree

saalinki puhekieltä A light timber or metal spreader fixed athwartships part way up a mast to spread the shrouds from higher up
1851, w:Herman Melville|Herman Melville, w:Moby Dick|Moby Dick, s:Moby-Dick/Chapter 35|chapter 35

Your most usual point of perch is the head of the t’ gallant-mast, where you stand upon two thin parallel sticks (almost peculiar to whalemen) called the t’ gallant crosstrees.