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Seller's Description

1977 Cape Dory 25 Masthead sloop with long keel. Old boat but solidly built. Ideal for weekend cruising or live aboard for one with a minimalist attitude. 3 draft. 5 headroom in the cabin. Lockable motor well. Needs cosmetics. Woodwork is in rough shape. Could use some deck paint. No soft spots but minor spider cracks in the fiberglass. Remember this is a 44 year old boat. Rigging could use tuning. Bottom gets scraped regularly but needs hauled out and painted. No pads inside. Just one bed recently bought. Very comfortable. Lots of storage space. V berth is extended to 7 feet if you want to sleep there. Also includes a 1988 Bauer fiberglass rowing dinghy. Rough shape cosmetically but dry, holds a lot of gear, and paddles easily. Titled for a small outboard. Clear Florida titles in my name for both the boat and dinghy. There is a tag office within walking distance of the marina where we can complete the deal. Vessels will not be released without transfer of titles. Buyer responsible for tag, tax, title, moving, and mooring. No exceptions. Boat and dinghy for cash only. No trades. No splitting them up. No holding the note. This is no fancy yacht. Just a good solid sailboat with a nice old dinghy at a good price. Boat is currently moored in Boot Key Harbor on a mooring ball and must be moved immediately upon sale. If there are balls available you might be able to move to another ball. Currently there are other balls. Harbor facilities are nice with plenty of amenities and close to shopping and boat yards. About $360 a month. Best deal in the Keys if you are looking to live here. Need any more info or if you want to come take a look email me thru the ad.

Equipment: Includes: new 100 watts solar panel with 1 deep cycle battery. New electric panel. Composting toilet. Rigging is all dyneema. One mainsail, 2 foresails in decent shape. VHF radio. Compass. Magma grille and single burner propane stove. Required safety gear and misc other equipment. Plenty of dock and mooring lines. Two anchors. Need chain and rode for one. Brand new Mercury 4hp long shaft outboard. Yeti cooler.


Carl Alberg
Cape Dory Yachts
Cape Dory Sailboat Owners Association
# Built


Length Overall
27 0 / 8.2 m
Waterline Length
20 0 / 6.1 m
7 6 / 2.3 m
2 11 / 0.9 m
7,500 lb / 3,402 kg
3,000 lb / 1,361 kg

Rig and Sails

Reported Sail Area
354′² / 32.9 m²
Total Sail Area
354′² / 32.9 m²
Sail Area
167′² / 15.6 m²
29 9 / 9.1 m
11 3 / 3.4 m
Air Draft
Sail Area
187′² / 17.4 m²
33 11 / 10.4 m
10 11 / 3.4 m
Forestay Length
35 8 / 10.9 m

Auxilary Power

Fuel Type
Fuel Capacity
Engine Hours


Water Capacity
Holding Tank Capacity


Hull Speed
5.7 kn
Classic: 5.99 kn

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.


Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL

5.66 knots
Classic formula: 5.99 knots
Sail Area/Displacement
<16: under powered

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.


SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
<16: under powered
16-20: good performance
>20: high performance
>40: stiffer, more powerful

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.


Ballast / Displacement * 100

<40: less stiff, less powerful
>40: stiffer, more powerful
>350: ultraheavy

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.


D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
30-40: moderate bluewater cruising boat

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.


Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
<2.0: better suited for ocean passages

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.


CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
<2: better suited for ocean passages
>2: better suited for coastal cruising

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

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