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Seller's Description

1977 Pearson 365 Ketch (hull #120) Recent $15k yard work repairing corroded main mast step, new roller furling, and all new standing rigging. Brand new main and mizzen (full batten) from Fareast sails. Bon Temps is a reliable boat that can really move with some fresh breeze. Federally registered, Bon Temps is ready to sail away. She is complete; however, she retains much of her original equipment. Westerbeke 40 runs strong and does not smoke. Leaks oil through the rear seal (common on “westerleaks”). Engine has been rebuilt at least once and does not appear to be in need of replacement any time soon. Paragon transmission that does what is asked of it. Original wiring and fuses - works but needs replacement updating. LectraSan head - no pumpouts! Cosmetically, the cabin interior is clean with no major issues. Freshwater system needs new piping. Exterior - hull and topsides could use a repainting. Bon Temps has been a great family day-sailer / weekender but kids and family commitments compete with needed work that was intended to be done on her. A solid hull / platform and a beauty under sail, everyone wants to talk to you when you pull into your slip for the evening. Currently in-water in Rock Hall, MD. Dry winterstorage in Rock Hall, MD paid for the Nov.’22 to April ‘23.

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Specs

Designer
William Shaw
Builder
Pearson Yachts
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG

Dimensions

Length Overall
36 6 / 11.1 m
Waterline Length
29 11 / 9.1 m
Beam
11 6 / 3.5 m
Draft
4 5 / 1.4 m
Displacement
17,700 lb / 8,029 kg
Ballast
7,300 lb / 3,311 kg

Rig and Sails

Type
Ketch
Reported Sail Area
613′² / 57 m²
Total Sail Area
519′² / 48.2 m²
Mainsail
Sail Area
212′² / 19.7 m²
P
35 11 / 11 m
E
11 8 / 3.6 m
Air Draft
?
Foresail
Sail Area
308′² / 28.6 m²
I
41 0 / 12.5 m
J
14 11 / 4.6 m
Forestay Length
43 8 / 13.3 m
Mizzen
PY
24 0 / 7.3 m
EY
7 9 / 2.4 m

Auxilary Power

Make
Westerbeke
Model
4-108
HP
42
Fuel Type
Diesel
Fuel Capacity
50 gal / 189 l
Engine Hours
?

Accomodations

Water Capacity
150 gal / 568 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.7 kn
Classic: 7.34 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

7.73 knots
Classic formula: 7.34 knots
Sail Area/Displacement
14.4
<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.

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.
14.44
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
41.2
>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.

Formula

Ballast / Displacement * 100

41.24
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
293.1
275-350: heavy

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
293.06
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
33.2
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.

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
33.22
<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
1.8
<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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
1.75
<2: better suited for ocean passages
>2: better suited for coastal cruising

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