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.
s/v Invincible 1986 Catalina 30 Standard Rig
Well maintained and in good condition with plenty of extras. Universal M25 engine in good condition. Mast was dropped in spring 2023 for service and to facilitate new rigging, lights, and furler, all professionally installed. New cockpit engine panel professionally installed. Plenty of other extras including PFDs, bumpers, boat hooks, bosuns chair. Currently on the hard at West Island Marina, Fairhaven MA. Vessel is offered as is for $12,000 which includes all items listed.
The boat needs the following which have been considered in the price: New sails Alternator connected to engine panel
Equipment: Includes new Alternator (2024) Raw water pump (2024) Bilge pump (2024) Fresh water pump (2024) Battery combiner (2024) Engine control panel with harness upgrade kit (2024) Primary fuel filter (2024) House and starter batteries (2024) Engine starter and solenoid (2024) Engine glow plug relay for improved starting (2024) Harken MK IV Furler (2023) All rigging (2023) Mast head light (2023) Deck light (2023) Fuel tank (2022) Fuel pump (2022) Jabsco toilet (2019) Hard dodger Solar panel (2019) and charge controller (2023)
Other features Unique custom hard dodger (2019) Lazy jacks Bimini 35 lb CQR anchor Custom canvas winter cover 9 Zodiac hard bottom dinghy, new in (2021) 9.9 hp Mercury outboard for dinghy Mooring tackle New Catalina Direct window reseal kit
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 SailboatListings.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.