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Adhara 30
Designer: Doug Peterson  ·  Builder: Dencho Marine (Usa)  ·  First built: 1985
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About the Adhara 30

With limited documentation available, the Adhara 30 represents one of those intriguing sailboats that has maintained a relatively low profile in the broader sailing community. This 30-foot sailboat appears to cater to sailors seeking a capable coastal cruiser that can handle weekend adventures and extended regional passages with confidence. Based on its name and size category, the Adhara 30 likely embodies the design philosophy common to boats of its era, prioritizing seaworthiness and practical sailing characteristics over flashy performance numbers. Boats in this size range typically offer an appealing balance between manageable size for couples or small crews and sufficient interior volume for comfortable cruising. The scarcity of readily available specifications suggests this may have been a limited production model or perhaps represents a design that achieved its goals without generating significant market buzz. For prospective buyers researching the Adhara 30, this relative obscurity could present both opportunity and challenge—potentially offering good value in the used boat market while requiring more thorough individual inspection and research. Sailors considering this boat should focus on evaluating the specific vessel's condition and maintenance history, as individual examples may vary considerably in their current state and capabilities.

Core Dimensions
LOA (Length Overall) 29.89 ft / 9.11 m
LWL (Waterline Length) 25.50 ft / 7.77 m
Beam 10.67 ft / 3.25 m
Max Draft 5.75 ft / 1.75 m
Displacement 4,800.00 lb / 2,177 kg
Ballast 2,200.00 lb / 998 kg
Ballast Type Lead
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Doug Peterson
Builder Dencho Marine (USA)
First Built 1985
Last Built 1986
Number Built 3
Related Sailboats J30 · Olson 911 S · Santana 30 30Gp · Cal 92 · Tartan 3000
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Known Issues & What to Watch For

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
90
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
45.83
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
129.23
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 5.83 pounds/inch
Rig Dimensions
I (Foretriangle Height) 26.39
J (Foretriangle Base) 12.07 ft / 3.68 m
P (Mainsail Luff) 468.00 ft² / 43.48 m²
E (Mainsail Foot) 129.23
How It Compares

vs. Cal 92, J30, Olson 911 S, Santana 30 30Gp, Tartan 3000

This boat Similar boats
Dimensions
LOA
Adhara 30 ★
29.9 ft
Cal 92
30.0 ft
J30
29.8 ft
Olson 911 S
29.9 ft
Santana 30 30Gp
29.9 ft
Tartan 3000
30.0 ft
LWL
Adhara 30 ★
25.5 ft
Cal 92
25.4 ft
J30
25.0 ft
Olson 911 S
25.0 ft
Santana 30 30Gp
25.4 ft
Tartan 3000
25.3 ft
Beam
Adhara 30 ★
10.7 ft
Cal 92
10.3 ft
J30
11.2 ft
Olson 911 S
10.3 ft
Santana 30 30Gp
10.3 ft
Tartan 3000
10.1 ft
Displacement
Adhara 30 ★
4 lbs
Cal 92
7 lbs
J30
7 lbs
Olson 911 S
7 lbs
Santana 30 30Gp
6 lbs
Tartan 3000
7 lbs
Ballast
Adhara 30 ★
2 lbs
Cal 92
2 lbs
J30
2 lbs
Olson 911 S
3 lbs
Santana 30 30Gp
2 lbs
Tartan 3000
3 lbs
Sail Area
Adhara 30 ★
Cal 92
388 sq ft
J30
444 sq ft
Olson 911 S
475 sq ft
Santana 30 30Gp
340 sq ft
Tartan 3000
441 sq ft
Performance
PHRF Rating (lower = faster)
Adhara 30 ★
90 s/nm
Cal 92
J30
Olson 911 S
126 s/nm
Santana 30 30Gp
171 s/nm
Tartan 3000
162 s/nm
SA / Displacement (higher = more powerful)
Adhara 30 ★
Cal 92
17.0
J30
19.5
Olson 911 S
20.5
Santana 30 30Gp
16.5
Tartan 3000
17.8
Ballast / Disp (higher = stiffer)
Adhara 30 ★
45.8 %
Cal 92
J30
Olson 911 S
44.4 %
Santana 30 30Gp
Tartan 3000
Comfort Ratio (higher = more comfortable offshore)
Adhara 30 ★
Cal 92
18.0
J30
16.4
Olson 911 S
18.7
Santana 30 30Gp
15.6
Tartan 3000
21.2
Capsize Screening (lower = safer)
Adhara 30 ★
Cal 92
2.16
J30
2.34
Olson 911 S
2.14
Santana 30 30Gp
2.26
Tartan 3000
2.02
Displacement / Length (lower = lighter)
Adhara 30 ★
129
Cal 92
J30
Olson 911 S
205
Santana 30 30Gp
Tartan 3000
Hull Speed
Adhara 30 ★
Cal 92
6.8 kts
J30
6.7 kts
Olson 911 S
6.7 kts
Santana 30 30Gp
6.8 kts
Tartan 3000
6.7 kts
Speed Number (higher = faster)
Adhara 30 ★
Cal 92
2.8
J30
3.0
Olson 911 S
3.0
Santana 30 30Gp
3.8
Tartan 3000
2.6
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