23 Mast question

[Cruzin]

I have a block (?) on the top starboard side of my mast and wondered what it is used for? It is about 2 inches from the mast top and is flush with the starboard side of the mast. I will try to attach a photo.

Thanks

Dale

[Endeavor]

I?d say spinnaker or code 0 as you have a self furling jib. 

[Cruzin]

What do you mean code 0? I had thought it might be for a spinnaker but don't know anything about them. I appreciate your reply.
Thanks

[Endeavor]

Hello, here one definition of a code 0

Code 0 is a loose luffed sail between an asymmetric spinnaker and a genoa. It can be carried more close to the wind very useful for new generation boats with short-overlap headsails. The advantage of these sails is that they can be furled and lowered into a sail bag.

Basically, a very light weight sail with only 2 points of attachment-tack and halyard that can be used in a wide degree of off wind angles: close, broad and beam reaches. For the racer types a spinnaker should be used down wind.  For my setup a whisker pole and doing wing-on-wing works for me.

My boat uses the older style hank on Jib, so I have a drifter which a similar idea but hanks on to the forestay.

[Cruzin]

Thank you!