Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts.
Catalina 25, 1986 sailboat for sale 9.9HP outboard auxiliary - roller furling genoa - 2+2 battened mainsail with cover - standing rigging inspected 2022, 2024 - new main halyard and genoa sheets, 2023 - Raymarine ST1000 tiller pilot installed 2023 - Working Datamarine depth meter and knotmeter/log - Working Ritchie compass - Foss Foam balanced rudder added 2022 - Pop-top and pop-top cover - Origo 3000 two-burner stove added 2023 - Marine head upgraded to Raritan PH3 2021 - New 12V service panel and Rule 750gph electric bilge pump added 2022 - Bottom paint redone 2024 Puffin III is a fine, dry boat, ideal for day sailing or coastal cruising on Lake Michigan or wherever you might want to move her. She is ready to splash and sail as soon as weather permits. Currently on the hard for the winter at Anchors Way Marina in St. Joseph, MI, she has a cradle but does not have a trailer available. or phone 651-353-0-six-nine-one
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
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
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
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
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)
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)
This listing is presented by SailingTexas.com. Visit their website for more information or to contact the seller.
Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts.
©2025 Sea Time Tech, LLC
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.