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Seller's Description

Comes with most of the standard C470 items. New in the last 5 years: All port lights 3 hatches electric aft head bottom job 3 months old Unique items: arched davit 800 watts solar on arch washer dryer combo My wife and I cruised on a 36ft boat in 2008 and were preparing this one to cruise again when we had our son and decided to be landlubbers. Add this to starting a successful busines. Unfortunately, its time to admit defeat and sell our beautiful boat. The arched davit to me is very important, both for a lot of solar power and to get the dinghy up every night for safe keeping. All systems work on the boat. We live 20 minutes from the boat so can show it just about any time. update 7/6/2020: Ive lowered the price to $159K, not because the boat is in bad shape, but because its just not showing and Id like to see her sell. Come see the boat, I think you will be surprised how clean she is.

Equipment: Notable equipment: In mast full vertical batten furling Jib furling Powered main winch SSB Washer dryer Arched Davit 800 watts solar power Multiple spare sails in like new condition including 3 spinnakers and pole All new fixed and opening portlights - no crazing

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Specs

Designer
Gerry Douglas
Builder
Catalina Yachts
Association
Catalina 18
# Built
?
Hull
Monohull
Keel
Wing
Rudder
?
Construction
FG

Dimensions

Length Overall
18 0 / 5.5 m
Waterline Length
6 0 / 1.8 m
Beam
14 0 / 4.3 m
Draft
6 0 / 1.8 m
Displacement
1,500 lb / 680 kg
Ballast
430 lb / 193 kg

Rig and Sails

Type
Sloop
Reported Sail Area
155′² / 14.4 m²
Total Sail Area
151′² / 14 m²
Mainsail
Sail Area
86′² / 8 m²
P
20 2 / 6.2 m
E
8 5 / 2.6 m
Air Draft
?
Foresail
Sail Area
65′² / 6 m²
I
20 0 / 6.1 m
J
6 5 / 2 m
Forestay Length
21 0 / 6.4 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
7.0 kn
Classic: 5.42 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.

Formula

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

6.98 knots
Classic formula: 5.42 knots
Sail Area/Displacement
18.9
16-20: good performance

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.

Formula

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.
18.93
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
28.4
<40: less stiff, less 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.

Formula

Ballast / Displacement * 100

28.38
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
153.4
100-200: light

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
153.44
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
9.2
<20: lightweight racing 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.

Formula

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
9.21
<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
2.7
>2.0: better suited for coastal cruising

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
2.65
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

In 2000 Catalina Yachts renamed the CAPRI 18 to the CATALINA 18.
Photo courtesy Adam Hunt.

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