SeaGoat
New Member
- Aug 26, 2020
- 11
- Boat Info
- 2009 280 Sundancer
- Engines
- Twin 4.3 Mercruiser w/Bravo III Drives
Hi All,
New to the forum, and I'm in the process of purchasing a 2009 280 Sundancer and the bank is asking for the dimensions on the boat. Now that's fine and I have the beam, length and draft. However they are also asking for the depth (???), which is defined as the height from the bottom of the keel to the deck. I cannot find this number anywhere on the interwebs.
It looks like this is used for calculating the tonnage by the USCG to determine if registration is required. I'm pretty sure that's not the case since it is not currently registered, but you never know.
Help!
Now I do know that the draft is 23" and it looks like the swim step is just above waterline and the deck is just above that so... Maybe it's 2.5' or 2.75? Being a smarty pants I looked up the USCG formula, a closely guarded secret apparently. Plugging in these numbers I get 4.98 for the tonnage (with 2.75). This doesn't seem like an accident so I'm thinking this is right.
But, does anyone know what this actually is?
Also for the curious, the USCG formula (For a V hull like this) is:
(Shape X Keel X Length X Beam X Depth) / 100
Where Shape is 0.67 for most power boats, and Keel is 1.0 for the same.
(Note there is reference to adding in the deck structure, but I believe that's for larger boats than this one.)
Also there is no rounding of the tonnage. Any decimal is dropped so the effective tonnage may be 4. Except I am completely guessing.
One final note (Congrats this post is long and you made it! Oh, that's not the note though). I would love to measure the boat, but I don't have easy access to it at the moment as it's a 3 hour drive away and the seller is not handy at the moment.
New to the forum, and I'm in the process of purchasing a 2009 280 Sundancer and the bank is asking for the dimensions on the boat. Now that's fine and I have the beam, length and draft. However they are also asking for the depth (???), which is defined as the height from the bottom of the keel to the deck. I cannot find this number anywhere on the interwebs.
It looks like this is used for calculating the tonnage by the USCG to determine if registration is required. I'm pretty sure that's not the case since it is not currently registered, but you never know.
Help!
Now I do know that the draft is 23" and it looks like the swim step is just above waterline and the deck is just above that so... Maybe it's 2.5' or 2.75? Being a smarty pants I looked up the USCG formula, a closely guarded secret apparently. Plugging in these numbers I get 4.98 for the tonnage (with 2.75). This doesn't seem like an accident so I'm thinking this is right.
But, does anyone know what this actually is?
Also for the curious, the USCG formula (For a V hull like this) is:
(Shape X Keel X Length X Beam X Depth) / 100
Where Shape is 0.67 for most power boats, and Keel is 1.0 for the same.
(Note there is reference to adding in the deck structure, but I believe that's for larger boats than this one.)
Also there is no rounding of the tonnage. Any decimal is dropped so the effective tonnage may be 4. Except I am completely guessing.
One final note (Congrats this post is long and you made it! Oh, that's not the note though). I would love to measure the boat, but I don't have easy access to it at the moment as it's a 3 hour drive away and the seller is not handy at the moment.