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Sailboat Specifications

Apollo 18

Cat (Rotating Spar) · Catamaran Twin Dbrd.

Designed by Neil Coster · Built by Prout Marine (Uk) · First built 1969

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LOA 18.00 ft  ·  Beam 7.50 ft  ·  Displacement 240.00 lb  ·  Sail Area 150  ·  Cat (Rotating Spar)  ·  Catamaran Twin Dbrd.
About the Apollo 18 Sailboat

Built during the early days of production fiberglass sailboats, Apollo 18 represents a classic example of affordable family sailing from that era. This compact daysailer and weekend cruiser was designed to provide accessible sailing for those seeking their first taste of boat ownership or a simple platform for coastal adventures. The Apollo 18's modest dimensions make her an ideal candidate for trailering, allowing owners to explore different sailing venues without the expense of marina slips. Her straightforward rigging and uncomplicated systems appeal to novice sailors learning the ropes, while still offering enough performance to keep experienced sailors engaged on afternoon outings. Like many boats of her generation, the Apollo 18 features a traditional fin keel configuration that provides reasonable stability and sailing characteristics for protected waters and light coastal cruising. The cockpit offers comfortable seating for a small crew, while the cabin provides basic shelter and storage for day trips or overnight adventures. While detailed specifications remain scarce, the Apollo 18's enduring presence in the used boat market suggests she found favor among sailors seeking dependable, no-frills sailing at an attractive price point. Her simple construction and systems make maintenance relatively straightforward for do-it-yourself owners.

Dimensions & Specifications
LOA (Length Overall) 18.00 ft / 5.49 m
Beam 7.50 ft / 2.29 m
Max Draft 2.50 ft / 0.76 m
Min Draft 0.4
Displacement 240.00 lb / 109 kg
Sail Area (Reported) 150
Design & Construction
Hull Type Catamaran Twin Dbrd.
Rigging Type Cat (rotating spar)
Construction FG
Designer Neil Coster
Builder Prout Marine (UK)
First Built 1969
Related Sailboats Hobie 18 · Prindle 18 · Dart 18 · Prindle 18 2 · A Class Catamaran
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Frequently Asked Questions

What is the Apollo 18's sail area to displacement ratio?

The Apollo 18 has a Sail Area to Displacement ratio (SA/D) of 62.2. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Apollo 18's comfort ratio?

The Apollo 18 has a Ted Brewer Comfort Ratio of 1.56. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Apollo 18 safe for offshore sailing?

The Apollo 18 has a Capsize Screening Formula value of 4.83. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Apollo 18?

The theoretical hull speed of the Apollo 18 is 5.24 kn knots, calculated from its waterline length.

How much does a Apollo 18 weigh?

The Apollo 18 has a displacement of 240.00 lb and a length overall (LOA) of 18.00 ft.

Who designed the Apollo 18?

The Apollo 18 was designed by Neil Coster, first built in 1969.