Done properly it's just fine.
Aye, that's the rub. We can't tell from looking at the outside if the inside was sleeved, too...
Hi, Ricardo, welcome to CF.
We had our boom break, and it was fixed with both an internal and external sleeve. It is stronger than new, now, and we are not worried about it at all.
Perhaps if you can find out if that is original? or, if it has been repaired, how the repair was made, and what caused the failure. If the boat is not used much, perhaps the owner doesn't trust the fix. I kind of doubt it, our mast iwas made in sections, and is doubled, but the area where it is joined covers quite a larger area, unlike the small patch on the exterior of the mast in the photographs.
I apologize for the non-definitive answer, but I am a conservative old witch; neil pride may well have the right of this; he has more experience with rigs than i do.
The questions are the following:
1 - was the mast broken and that is a way to patch the mast? Possibly, a broken cap shroud could have caused it.
If not it is normal to have mast such that?
2 - Is it safe to sail with the mast in those conditions? I am not sure it is.
3- Should a new mast be bought? Possibly, or re-repaired, better.
4- Do you have a base price how much a new mast will cost for a Nic 35? It would be best to enquire that of a local rigger. Sometimes they have partial mast sections in storage that can be brought into play for a repair after they figure out you are not going to buy a new one from them.