Aquarius 21 Sailboat Review, Specs, and Listings

Peter Barrett·1969 – 1977·Coastal Recreation Inc.
Aquarius 21 drawingBuilder drawing
Hull Type
Monohull · centerboard
Rig
Fractional Sloop
LOA
21' · 6.4 m
Disp.
1,900 lbs · 862 kg
First year
1969

The Aquarius 21 is a trailerable fiberglass monohull designed by Peter Barrett and introduced by Coastal Recreation Inc. in 1969. Production continued until 1977, when the model went out of production. This 21foot coastal cruiser combines shallow draft, simple outboard power, and sleeping space for four in a compact package.

Measurements

Dimensions 01

Length Overall
21 ft
Length on deck
—
Waterline Length
18.25 ft
Beam
7.82 ft
Draft
4.5 ft
Maximum Headroom
—
Air Draft
—

Construction & hull 02

Construction
Fiberglass
Hull Type
Monohull
Keel Type
Centerboard
Rudder
1× —
Ballast
665 lbs
Displacement
1,900 lbs
Water Capacity
—
Fuel Capacity
—

Rig & sails 03

Rigging Type
Fractional Sloop
Mainsail luff
19.5 ft
Mainsail foot
10 ft
Foretriangle height
18.2 ft
Foretriangle base
7.2 ft
Forestay Length (estimated)
19.57 ft
Sail Area
163 sqft

Calculations 04

Sail Area to Displacement Ratio
17
Ballast to Displacement Ratio
35
Displacement to Length Ratio
139.55
Comfort Ratio
9.94
Capsize Screening Ratio
2.53
Hull Speed
5.72 kn

Design and Construction

The Aquarius 21 measures 21 feet overall, with a 7.82-foot beam and a displacement of 1,900 pounds. She carries 665 pounds of ballast and has a centerboard keel that draws 1 foot with the board up and 4.5 feet with it down. These figures place her among the lighter, trailerable coastal cruisers of her era.

Peter Barrett gave the boat a spooned, raked stem and an angled transom. The hull is solid fiberglass rather than a cored laminate. Her ballast-to-displacement ratio is 35 percent, and her capsize screening value is near 2.53. The displacement-length ratio of 139.55 indicates a relatively heavy, low-powered hull for its length.

A retractable centerboard and transom-hung, tiller-steered rudder provide the shallow-draft flexibility expected of a trailer-sailer, allowing the Aquarius 21 to gunkhole where fixed-keel boats can’t.

Rig and Handling

The Aquarius 21 carries a fractional sloop rig—a Bermuda-rigged, fractionally stayed arrangement—with 163 square feet of sail. Her sail-area-to-displacement ratio is 17, and her hull speed is around 5.72 knots. These numbers point to gentle coastal sailing rather than speed.

Her PHRF racing average handicap of 273 puts her firmly at the slow end of the racing spectrum, consistent with her ballast-heavy, short-waterline hull form.

Accommodations

Below, a pop-top cabin provides standing room. The boat sleeps four, with a double V-berth forward and two quarter berths beneath the cockpit in the main cabin.

The galley is on the port side, just forward of the companionway ladder, and includes a stove and sink. The head is tucked beneath the port side of the forward V-berth. It’s a compact but functional arrangement for weekending, and the quarter berths make practical use of the space under the cockpit sole.

The Verdict

The Aquarius 21 is a straightforward small coastal cruiser. Her appeal lies in the versatility of her shallow-draft centerboard, simple outboard power, and usable sleeping layout, all in a trailerable package. She isn’t a strong performer by racing standards, but her documented proportions and accommodations make her a sensible entry-level boat or pocket cruiser.

Pros

  • Retractable centerboard provides a 1-foot draft for launching and gunkholing
  • Pop-top cabin, double V-berth, and two quarter berths provide sleeping space for four
  • Simple fractional sloop rig and outboard motor make for straightforward ownership

Cons

  • A PHRF handicap of 273 confirms that she is slow relative to other racing boats
  • The low sail-area-to-displacement ratio of 17 limits light-air performance
  • Compact galley and head are suited only to minimal cruising needs

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