Com-Pac 23 Mk IV Sailboat Review, Specs, and Listings

Clark Mills·1997·Com-Pac Yachts
Com-Pac 23 Mk IV drawingBuilder drawing
Hull Type
Monohull · fin
Rig
Masthead Sloop
LOA
23.92' · 7.29 m
Disp.
3,000 lbs · 1,361 kg
First year
1997

The ComPac 23 Mk IV is the fourth evolution of Clark Mills's pocket cruiser, a trailerable monohull that ComPac Yachts has built in the United States since 1978 and offers as the Mark IV and Pilothouse variants. More than 600 of the 23foot lineage have been built to date, and the design's staying power rests on a traditional silhouette, a shallow shoal keel, and an interior that punches above its length.

Measurements

Dimensions 01

Length Overall
23.92 ft
Length on deck
Waterline Length
20.17 ft
Beam
7.83 ft
Draft
2.25 ft
Maximum Headroom
Air Draft
30 ft

Construction & hull 02

Construction
Fiberglass
Hull Type
Monohull
Keel Type
Fin
Rudder
1× Transom-Hung
Ballast
1,340 lbs (Lead)
Displacement
3,000 lbs
Water Capacity
Fuel Capacity

Rig & sails 03

Rigging Type
Masthead Sloop
Mainsail luff
22.75 ft
Mainsail foot
8.5 ft
Foretriangle height
26 ft
Foretriangle base
9.42 ft
Forestay Length (estimated)
27.65 ft
Sail Area
250 sqft

Calculations 04

Sail Area to Displacement Ratio
19.23
Ballast to Displacement Ratio
44.67
Displacement to Length Ratio
163.21
Comfort Ratio
14.04
Capsize Screening Ratio
2.17
Hull Speed
6.02 kn

Design and Construction

Mills gave the boat a sweeping sheerline that runs aft from a short bowsprit and bends upward just ahead of the transom-hung rudder, and the box cabintrunk with round or oval bronze ports flows naturally into the deck lines. The hull is solid fiberglass with longitudinal stringers that encapsulate the bulkheads and stiffen the panels, while the deck is balsa-cored and molded outside the builder's shop. Below, the finish is above average for the class: handmade plywood bulkheads with teak veneers, teak cabin-side paneling, and a teak-and-holly sole that reads as a very nice touch on a small boat. The Mk IV keel and rudder both use a NACA airfoil low-drag, high-lift section, and the shoal fin draws just 2 feet 3 inches, letting the boat skip across shallows that deeper-draft cruisers must tack around.

Rig and Handling

The Com-Pac 23 carries a masthead sloop rig with a 30-foot mast that was engineered to be raised and lowered without a gin pole, a real advantage for a trailerable design. The standing rigging reads a bit undersized for the rig's height, though that is the trade made for easy stepping. On the water she is nimble but not close-winded; wide sheeting angles and a touch of weather helm appear when beating, yet she reaches beautifully and owners report touching her 6-knot theoretical hull speed fairly regularly on a reach. The hull shape tends to pitch but does not pound in a chop, and the shallow forefoot with long keel gives tractable behavior in thin water.

Accommodations

The nearly eight-foot beam makes the cabin genuinely spacious for a 23-footer, and there is just one step down to a saloon where standing headroom exists only under the companionway. Sleeping is honest for four: a double V-berth forward, a portable head stowed in a compartment between those bunks, and two straight settee quarter berths aft. The hide-away galley usually places a two-burner stovetop to port and a stainless sink to starboard, with a portable table that mounts on the bulkhead; two overhead hatches and six opening bronze ports keep the interior ventilated.

Cockpit and Deck Gear

The cockpit is the boat's best design feature: more than seven feet long, self-bailing, with two lockers and a bridgedeck, and surprisingly comfortable for days on the hook. Stainless pulpits and stanchions are beefy by small-boat standards, teak cabintop handrails and molded nonskid make the narrow side decks safe to work, and most boats carry bronze cleats with small standard sheet winches. The transom typically mounts both an outboard bracket and a swim ladder, which crowds that area somewhat.

Evolution and Variants

The original 1978 design begat the 23/2 in the mid-1980s with the hide-away galley and a bowsprit that moved the sail-area center of effort forward to reduce weather helm, then the 23/3 in the early 1990s with tooling upgrades such as larger oval ports. Later Mk IV changes brought a small ballast increase, on-deck anchor locker, PVC rubrail with stainless striker, foil rudder blade, and an optional 9 hp Yanmar inboard; the rare 23 D carried a 10 hp single-cylinder Yanmar diesel with only about 35 built. The vast majority of 23s left the factory with outboards, most seen on the market being 8 hp units with a built-in locker for a six-gallon tank.

The Verdict

The Com-Pac 23 Mk IV is a practical, traditional pocket cruiser that trades upwind precision for shoal-water freedom and a roomy, teak-trimmed cabin. She rewards the ramps-and-anchorage cruiser more than the buoy-racer, and her trailerable mast and shallow hull make her an accessible coastal camp cruiser.

Pros

  • Shoal 2'3" keel with NACA foil section opens shallow creeks and easy launches
  • Roomy cabin with real four-berth sleep and hide-away galley on a near-eight-foot beam
  • Mast steps without a gin pole; above-average teak-and-holly interior finish
  • Long, self-bailing cockpit with bridgedeck and secure beefy stanchions

Cons

  • Not close-winded; wide sheeting and weather helm when beating
  • Undersized standing rigging for a 30-foot mast
  • Standing headroom only at the companionway
  • Transom crowded by combined outboard bracket and swim ladder

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