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2020 Com-Pac Sunday Cat

$22,950 USD

Seller's Description


2020 Com-Pac 17 ft. Sunday Cat In Like New Condition Bimini, 2020 Tohatsu 6 HP and Magic Tilt Trailer with Spare Tire & Mounting Bracket Like the Sun Cat with More Cockpit Room and Less Cabin Transom Boarding Ladder Navigation Lights & Interior Light

Teak Cockpit Grate Basic Boat Info Boat Name: Wind Therapist Make: Com-Pac Model: Sunday Cat Year: 2020 Condition: Used Category: Sail Builder: Com-Pac Yachts Designer: Clark Mills Construction: Fiberglass Boat Hull ID: ABV17511E020 Has Hull ID: Yes Keel Type: Centerboard Dimensions Length: 17 ft Length Overall: 17’4 ft Waterline Length: 15 ft Beam: 7’3 ft Max Draft: 4’6 ft Min Draft: 1’2 ft Displacement: 1,500 lb Engines / Speed Engines: 1 Make: Tohatsu Model: 6 HP Fuel: Unleaded Engine Power: 6hp Type: Outboard Year: 2020 Engine Location: Starboard Other Heads Count: 1 Boat Class: Daysailers

Call Cell or Text: Ann Koch 770-540-9796 Rich Michel 404-642-3007 Marc Kenney 615-424-4451

Equipment: Deck, Cuddy, Sails & Rigging: The concept of the Sunday Cat was to have a boat with the cockpit space of our current Sun Cat Daysailer but with the convenience of an enclosed porta potty area. It also provides shelter in the event of inclement weather. There is an abundance of storage space that is accessible through the seat locker hatches in the cockpit in addition to the little cabin.

The cabin is not only large enough for the porta potty and gear but there is plenty of room for a cooler.

The Sunday Cat is not a sleep aboard boat but is intended to be the ultimate daysailer that provides room for all of your gear and the ability for you to have extended day sails because of the available porta potty.

The Sunday Cat boasts, as standard equipment, the newest version of our Mastendr Quick Rig Sailing System, the Mastendr Plus. The Mastendr Plus allows raising the mast from the cockpit. There is nothing to attach or prepare. Simply raise the leverage yoke, pull the slack out of the line, and raise the mast as if it were a sail.

Bimini, New Port-Potti, 6 HP Tohatsu Outboard, Magic Tilt Trailer w/Spare Tire & Mounting Bracket, Transom Boarding Ladder, Sail Cover, Mid Ship Folding Cleats Port & Starboard, Bottom Anti-Fouling Paint Additional Options Included Transom Boarding Ladder Magic Tilt Custom Trailer w/ Spare Tire & Mounting Bracket New Portable Marine Toilet Midship Cleats (Folding) Port & Starboard Bimini Top w/Aluminum Frame Epoxy Bottom - Anti Fouling Paint Sail Cover w/Tiller Cover 6 Hp Tohatsu 2000 Long Shaft Marine Battery Electrical Package Switch Panel (Navigation, Cabin & Anchor Light) Teak Cockpit Grate Disclaimer The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.



Clark Mills
Com-Pac Yachts
# Built
Stub + Centerboard


Length Overall
16 11 / 5.2 m
Waterline Length
14 11 / 4.6 m
6 11 / 2.1 m
1 1 / 0.4 m 4 0 / 1.2 m
1,500 lb / 680 kg

Rig and Sails

Reported Sail Area
150′² / 13.9 m²
Total Sail Area
Sail Area
Air Draft
Sail Area
Forestay Length

Auxilary Power

Fuel Type
Fuel Capacity
Engine Hours


Water Capacity
Holding Tank Capacity


Hull Speed
6.2 kn
Classic: 5.19 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.


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

6.17 knots
Classic formula: 5.19 knots
Sail Area/Displacement
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.


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.
<16: under powered
16-20: good performance
>20: high performance

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.


Ballast / Displacement * 100

<40: less stiff, less powerful
>40: stiffer, more powerful
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.


D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

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


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
<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
>2.0: 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.


CSV = Beam ÷ ³√(D / 64)

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


A daysailer model (without the cuddy/cabin) is also available.

This listing is presented by Visit their website for more information or to contact the seller.

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