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1979 Pacific Seacraft Mariah


Seller's Description

Incredibly strong, high quality designed blue water boat with beautiful classical lines. This double ender cutter has full keel with cutaway forefoot to enhance maneuverability, large rudder hangs of the stern on three massive bronze gudgeons, high bulwarks with cap rails add beauty and safety, eight bronze portlights and 2 bronze dorade vents support good ventilation inside, bowsprit extends the sail base by another 5 feet forward and is firmly through bolted to the deck as well as to a pair of bronze capped oak Samsung posts. Bowsprit features a big bronze double anchor roller and windlass. Double deck pipes with bronze caps lead the anchor rodes through the foredeck into a split chain locker in the forepeak. Double lifelines supported by stanchions are bolted to the bulwark rather than to the deck to increase strength and eliminate source of water leaks. Inside presents 2 cabins with 5 berths and great deal of storage space all around the boat, u-shaped galley with gimbal 3 burner stove and a deep double stainless-steel sink, head with 2 portlights. This perfect cruiser can take you anywhere you want to sail.

Sail Area (SA): 656.00 ft Displacement: 16,000 lb Ballast: 6,000 lb SA/Displ: 16.59

Equipment: Schaefer Marine 2000 Jib Furler. Main sail, Staysail, Jib. Spare main, staysail, jib. Trysail, storm jib. Asymmetrical spinnaker. All sails in good or perfect condition. Whisker pole.

Monitor Windvane. Simrad Tiller Autopilot.

B&G Vulcan 9 chartplotter. Airmar transducer. Standard Horizon VHF.

45 lbs CQR Anchor with chain rode. 45 lbs Manson Anchor with nylon rode. 25 lbs Bruce Anchor with split chain and nylon rode.

2 automatic 2000 GPH bilge pumps. 2 manual bilge pumps.

2 x 50 gal water tanks. 1 x Automatic electric water pump. 2 x Manual water pump. Double deep SS sink. Bronze Perko Water Strainer.

Yanmar 2QM20 engine. Balmar Series 6 Alternator with external Balmar ARS-5 charge controller. 1 x 35 gal fuel tank. Air X wind generator.

Blue Sea AC Electrical Panel and Blue Sea DC Electrical Panel with remote battery switches and relay. Blue Sea SafetyHub 250 Fuse Block and Solenoid with Manual Control. Blue Sea VSM 422 Tank Senders.

LED running light. LED Anchor light. LED Tricolor light. LED cabin lights.

Plastimo 4 person offshore life raft. Jordan drogue series. Fiorentino Para-Anchor with rodes and oversized snap blocks.



Henry Morschadt
Pacific Seacraft
Pacific Seacraft Orion 27 Club
# Built


Length Overall
31 0 / 9.5 m
Length On Deck
27 3 / 8.3 m
Waterline Length
22 2 / 6.8 m
10 9 / 3.3 m
4 5 / 1.4 m
10,000 lb / 4,536 kg
3,500 lb / 1,587 kg (Lead)

Rig and Sails

Reported Sail Area
512′² / 47.6 m²
Total Sail Area
443′² / 41.1 m²
Sail Area
190′² / 17.6 m²
31 0 / 9.5 m
12 2 / 3.7 m
Air Draft
40 10 / 12.5 m
Sail Area
253′² / 23.5 m²
36 8 / 11.2 m
13 8 / 4.2 m
Forestay Length
39 2 / 12 m

Auxilary Power

Fuel Type
Fuel Capacity
20 gal / 75 l
Engine Hours


Water Capacity
75 gal / 284 l
Holding Tank Capacity
18 gal / 68 l
6 2 / 1.9 m


Hull Speed
6.0 kn
Classic: 6.31 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

5.99 knots
Classic formula: 6.31 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
<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.


Ballast / Displacement * 100

<40: less stiff, less powerful
>40: stiffer, more powerful
>350: ultraheavy

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
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.


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 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.


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


From BlueWaterBoats.org:

Beautiful, strong, and capable the Orion 27, introduced in 1979, was one of the earlier boats to come from the well trusted Pacific Seacraft stable. Pacific Seacraft built its reputation on robust boats constructed with attention to detail. It was notable for being the last design by Henry Mohrschladt, who was one of the two original founders of Pacific Seacraft. Built in California, most examples to this day can be found on the West Coast and at least one has circumnavigated. Brec Morgan set out in Otter in 1998, visiting over 50 countries before completing his odyssey in 2003.

Unsurprisingly for a Mohrschladt design, the Orion 27 has conservative lines. Under the waterline is a long keel with a forefoot cutaway to improve nimbleness and reduce wetted area. The sections carry the tried and true wine-glass shape. Don’t expect record setting pace with this kind of shape; think strong, safe, and good manners for heaving-to in the rough. There’s a 6’1″ bowsprit to help carry her canvas and the rig came in 3 variations; sloop, yawl, and cutter. The cutter rig, best suited to longer distance sailing has a self tending staysail.

Layout and Variations

In addition to the three rig options, Pacific Seacraft offered two cabin layouts, and steering in tiller or wheel; note most examples are found with wheel steering. In 1981 an improved MkII version was introduced with a longer coachroof, two deck hatches, and an extra set of portlights.

The two layouts were named “A” and “C”. Both have a double v-berth, a hanging locker, a head, and a quarter-berth. A shower located in the head was an optional extra as was a pressurized water system for it.

The A-layout is more common and has a relatively roomy U-shaped dinette to port, lowering the dinette table converts the area into a double berth. On the starboard side is the galley with a nav-station further aft.

The C-layout was designed for longer cruises. Here the U-shaped dinette is sacrificed to gain room for a larger head and shower combo as well as providing space for a larger v-berth and more stowage in the forward sections. At the bottom of the companionway is a wet locker.


Through the years the boat has proven to be of sturdy construction. The hull is of hand-laid fiberglass and the decks are of glass cored with plywood. The hull to deck join is a double-flange bedded in polyurethane adhesive, thru-bolted with stainless bolts. This forms the bulwarks which encloses the deck and is capped in teak.

Links, References and Further Reading

» Orion 27 Owners Yahoo Group
» A Field Guide to Sailboats of North America by Richard M. Sherwoo, p192

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

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