If the ad is up it’s still For Sale: 1984 Catalina 30 “Iolar” Marine condition and valuation survey 2021 valued boat at $ 18-22k Recent engine service including oil analysis. New roller furler professionally installed 2021. ($4.5K) Recent engine maintenance ($2k) New bottom paint 7/2020, hull excellent, no blisters seen on haul out. New sail cover 2021. Annual engine maintenance by Tricounty Marine.Running rigging 2019 or newer. Solid reliable cruiser, large owner’s association, easy to get parts. I have cruised extensively in the San Juans and Gulf islands over the past 3 years, the boat has predictable handling and performs well. Main is about 4 years old and is in fine shape, the headsail is fair but probably needs to be replaced next season.
Equipment: Danforth 10 kg anchor and spare, lots of extra lines, 2 propane tanks, the usual stuff on a Catalina 30. Old VHF electronics needs replacement. I use hand held devices which works well. Inflatable dinghy, paddles. Propane heater in cabin.
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)
BMW diesel (9hp) offered as an option.
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