GRAMPIAN 30
Specifications
Hull
| LOA | 29.75 ft |
| LWL | 25.5 ft |
| Beam | 9.5 ft |
| Draft | 4.67 ft |
| Displacement | 8,600 lb |
| Ballast | 3,870 lb |
| Hull speed1.34·√LWL | 6.8 kn |
Rig & Sails
| Iforetriangle height | 40 ft |
| Jforetriangle base | 11.5 ft |
| Pmainsail luff | 35.5 ft |
| Emainsail foot | 11 ft |
| FLforestay | 11 ft |
| Mainsail | 403.8 sq ft |
| Jib (100%) | 203 sq ft |
| Spinnaker | 345 sq ft |
Engine
| Commonly | Atomic 4, Yanmar, Kubota |
About the GRAMPIAN 30
Keel/CB version: Draft (max.) 7.00' / 2.13m Draft (min.) 3.00' / 0.91m Tall mast: (shown in drawing) I: 40.00' / 12.19m J: 11.50' / 3.51m P: 35.50' / 10.82m E: 11.00' / 3.35m Cutter rig w/bowsprit available as an option (1974). Photo courtesy Adam Hunt
Designed by Alex McGruer and built by Grampian Marine Ltd. (CAN) from 1969–1977, the Grampian 30 is a robust coastal cruiser with 400 hulls produced. Its heavy displacement of 8600.0 lb and fin keel configuration reflect a design philosophy prioritizing stability and seakeeping over pure speed.
- Best for:
- This boat suits coastal cruisers and weekend sailors who value a solid, traditional feel and are willing to perform routine maintenance on aging systems. It is less ideal for those seeking high-performance racing or low-maintenance plug-and-play sailing.
- Bluewater capability:
- With a D/L ratio of 231.54 and a capsize ratio of 1.86, the Grampian 30 is capable of offshore passages, though its age and reported structural issues require careful vetting before bluewater use.
- Comparables:
- Comparable boats include the Cal 30 and O'Day 30, which share similar dimensions and eras, but the Grampian distinguishes itself with a heavier displacement and distinct interior layout. It also compares to the Pearson 303 in terms of build quality and target market.
Performance
ORC Performance Data(1 certificate)
Measured performance data from ORC (Offshore Racing Congress) certificates.
Polar Diagram
Boat speed (kn) vs. true wind angle. Source: ORC
Racing Ratings
Triple Number
ORC Measured
Sail Areas (ORC)
Speed Table (kn)
| TWA \ TWS | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|
| 52° | 3.1 | 4.3 | 5.1 | 5.6 | 6.0 | 6.2 | 6.3 | 6.4 | 6.3 |
| 60° | 3.4 | 4.5 | 5.3 | 5.9 | 6.2 | 6.4 | 6.5 | 6.6 | 6.6 |
| 75° | 3.5 | 4.7 | 5.5 | 6.1 | 6.4 | 6.6 | 6.8 | 7.0 | 7.0 |
| 90° | 3.4 | 4.7 | 5.7 | 6.3 | 6.6 | 6.8 | 7.0 | 7.2 | 7.4 |
| 110° | 3.5 | 4.8 | 5.8 | 6.4 | 6.8 | 7.1 | 7.4 | 7.8 | 8.1 |
| 120° | 3.3 | 4.6 | 5.7 | 6.3 | 6.7 | 7.1 | 7.4 | 8.0 | 8.5 |
| 135° | 3.0 | 4.2 | 5.2 | 6.0 | 6.5 | 6.8 | 7.2 | 7.8 | 8.5 |
| 150° | 2.5 | 3.5 | 4.5 | 5.3 | 6.0 | 6.4 | 6.7 | 7.3 | 7.8 |
| Beat VMG | 2.0 | 2.7 | 3.3 | 3.7 | 4.1 | 4.3 | 4.4 | 4.4 | 4.2 |
| Run VMG | 2.1 | 3.1 | 3.9 | 4.6 | 5.2 | 5.6 | 6.0 | 6.6 | 7.1 |
Images
Estimated Value
Low ConfidenceAsking price by model year
10 listings · boat years 1970–1975 · median $19,000
Each dot is one listing · hover for details · dashed red line marks the median · obvious data-entry outliers (top & bottom 2.5%) excluded.
Estimated Cost of Ownership
Based on 29.75ft LOA. Actual costs vary by condition, usage, and local rates.
Articles & Reviews
Known Issues & Pre-Purchase Inspection
18 reported issues across 9 systems for the GRAMPIAN 30, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a GRAMPIAN 30? This is an in-depth report on the faults this model is known for — so you know exactly what to check when you walk the boat. For the price of a coffee.
- ✓ All 18 specific issues — severity, symptoms & fixes
- ✓ Model-specific pre-purchase inspection checklist
- ✓ Downloadable PDF to take to your surveyor — yours to keep
One-time $2.99 · secure checkout by Stripe · instant access · 30 days online, PDF yours to keep
Similar Sailboats
Which engine powers your GRAMPIAN 30?
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Brands sometimes mentioned for this model: Atomic 4, Yanmar, Kubota, Universal — is it one of these?
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Used sails that fit the GRAMPIAN 30
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