Best way to Level/ square up boat on stands

[Offshore121]

Any tips or ways to best level my boat on stands?
As of right now I have the Stern level from PORT to STBD. and cabin trunk and level bow to stern.
Rebuilding cabin walls and roof and just want to make sure boat is not twisted and "squared up".

 

[Diesel Jerry]

Pick a few spots along the deck, and other places from bow to stern and port to starboard. I think I used 4 or 5 levels at once when doing the final adjustments on the cradle for Tip Jar.

 

[Dslpwr]

Water level and then hang plumb bob off bow and mark floor where it points, as long as that stay on Mark you boat is level. At least so I’m told

 

[Genius]

We had a contract welder come out to the rig with a spirit level. Everything he was involved with was f'd up and crooked. They use squares and tapes for that reason.

I've never leveled a boat fore and aft while on the hard. I suppose it would make things easier.

Edit: If you do level the boat. I'm guessing you want to level to the water line (as it sits in the water). If you go to your sheer or deck, it won't be right (just thinking out-loud)

 

[Offshore121]

Water level and then hang plumb bob off bow and mark floor where it points, as long as that stay on Mark you boat is level. At least so I’m told

Are you using plumb bob line and bow as a reference for port/stbd level?

 

[Dslpwr]

Are you using plumb bob line and bow as a reference for port/stbd level?

Yes if it moves off mark you’ll kno it’s off level port or stbd

 

[Offshore121]

Yes if it moves off mark you’ll kno it’s off level port or stbd

Got it, thank you!

 

[Flying Finn]

I use a level set right on the crown of the transom

 

[speedwagon]

Set a laser to level and adjust the waterline to match.

 

[MAArcher]

Set a laser to level and adjust the waterline to match.

I have no experience but if I were to take a guess at the best way to do it, this would be it. Good laser levels are pricey but you can rent them too.

 

[fortier256]

Set a laser to level and adjust the waterline to match.

Just thinking this through.........If he is building / adding on to the boat, he wants everything square and plumb to match the boat, not necessarily to match how the boat sits in the water as that changes with weight distribution. I would adjust the stands so that any bulkheads that run thwart ship are plumb as the boat sits on the ground. This will indicate it being level fore and aft Most boat haulers will be sure that the boat is level as it sits side to side. A simple level on the deck or transom would indicate level from side to side. Thoughts are welcome correct me if I am wrong.