Well ahead on big masts!

Headbox for Seldén mast sections C 211 - C 304 and F 212 - F 305. The headboxes are equipped with a separa- tor, to make it easy to access the top sheaves. Just loosen the separator, which also works as a locking plate, and the sheaves can easily be lifted up for inspection or replacement. This means that you can replace the sheaves without unstepping the mast and removing the headbox. The separator is slightly angled at its front end to lead the spinnaker halyard on to the sheave. The headbox fitting has a gently rounded halyard lead for a masthead spinnaker or gennaker. Conventional spin- naker arrangement with one or two halyard blocks is, of course, still an option.An instrument base is available for bothstraight and angled tops. The instrument baseis designed to make it easy to dismantle the mid section when you need to access the mast top sheaves.
Mid section of instrument base easilyremoved to access top sheaves. Well organised and easily accessible. Top access, without unstepping the mastand removing the headbox. Separator locks sheaves and also controlsspinnaker halyard. 1312