Tonnage of a CD28 Sail

[Tom Nolan]

I recently passed the Coast Guard license test for Masters.
The tonnage the Coast Guard sets for the license is based
on the individual's experience level with different tonnage
vessels. We owned and sailed a 1975 28 ft Cape Dory
"Moonshadow" for several years and I will count that in my
experience base. Does anyone have information on the actual
tonnage of a Cape Dory 28 sailboat or a formula for the calculation?
Recall that the tonnage is not equal to the weight of the vessel.
thanks, Tom Nolan

[chuck yahrling]

I recently passed the Coast Guard license test for Masters.
The tonnage the Coast Guard sets for the license is based
on the individual's experience level with different tonnage
vessels. We owned and sailed a 1975 28 ft Cape Dory
"Moonshadow" for several years and I will count that in my
experience base. Does anyone have information on the actual
tonnage of a Cape Dory 28 sailboat or a formula for the calculation?
Recall that the tonnage is not equal to the weight of the vessel.
thanks, Tom Nolan

You can try the USCG Vessel Documentation Center for their hull formula. FWIW, My CD-27 came in at just over the 5 ton minimum for documentation using their formula estimate.



cyahrlin@cisco.com

[Brian Hickson]

For license purposes, I believe the Coast Guard uses Gross Tonnage, which is the internal capacity of a vessel measured in units of 100 cubic feet. Include in your calculations the space occupied by the engine, head, and lockers.

[Jerry Hammernik]

I recently passed the Coast Guard license test for Masters.
The tonnage the Coast Guard sets for the license is based
on the individual's experience level with different tonnage
vessels. We owned and sailed a 1975 28 ft Cape Dory
"Moonshadow" for several years and I will count that in my
experience base. Does anyone have information on the actual
tonnage of a Cape Dory 28 sailboat or a formula for the calculation?
Recall that the tonnage is not equal to the weight of the vessel.
thanks, Tom Nolan

Tom,
My CD28 is documented and the certificate says Gross 8 Net 7. Hope this helps.
Jerry Hammernik
Lion's Paw
CD28 #341



dauntles@execpc.com

[Tom Nolan]

Thank you all for your responses. I'll use Jerry's numbers.
Jerry, I was wondering did the Coast Guard calculate the tonnage
you used for the documentation?
Tom

I recently passed the Coast Guard license test for Masters.

The tonnage the Coast Guard sets for the license is based
on the individual's experience level with different tonnage
vessels. We owned and sailed a 1975 28 ft Cape Dory
"Moonshadow" for several years and I will count that in my
experience base. Does anyone have information on the actual
tonnage of a Cape Dory 28 sailboat or a formula for the calculation?
Recall that the tonnage is not equal to the weight of the vessel.
thanks, Tom Nolan

[Jerry Hammernik]

Thank you all for your responses. I'll use Jerry's numbers.
Jerry, I was wondering did the Coast Guard calculate the tonnage
you used for the documentation?
Tom

I recently passed the Coast Guard license test for Masters.

The tonnage the Coast Guard sets for the license is based
on the individual's experience level with different tonnage
vessels. We owned and sailed a 1975 28 ft Cape Dory
"Moonshadow" for several years and I will count that in my
experience base. Does anyone have information on the actual
tonnage of a Cape Dory 28 sailboat or a formula for the calculation?
Recall that the tonnage is not equal to the weight of the vessel.
thanks, Tom Nolan

I'm not sure who did the measurements. Tony Jeske who is a regular on this board did the original documentation. He may see this post and give us a better answer. The certificate of documentation lists the following numbers: Gross 8 Net 7 Length 28.2 Breadth 8.8 Depth 6.8. As we know, the tonnage is a volume measurement, so I believe these numbers are used to figure tonnage. A reference book I checked says that a gross ton is 100 cubic feet. Net tonnage is calculated by subtracting certain spaces (machinery, etc.) from the total volume. Hope this helps a little bit.
Jerry Hammernik
Lion's Paw CD28 #341



dauntles@execpc.com