Boom Vang

Original manual page 24

Catalina 310 boom vang drawing with fiddle blocks, pivoting tang and 3/8 inch Dacron line
310 Boom Vang. Labels include: boom; fiddle block w/ becket; mast; shackles to large "U" bolt on mast collar; pivoting tang; fiddle block at mast base; line leads aft to cockpit; 3/8" Dacron line supplied w/ vang; shackles to eye splice on wire.