Question 1

What are the specs of the SIGMA 36 (THOMAS)?

Accepted Answer

The SIGMA 36 (THOMAS) has the following specifications: 36ft LOA, 11.5ft beam, 6.42ft draft, 12,350lb displacement. Hull type: mono. Rig: Fractional Sloop. Keel: Fin.

Question 2

Who built the SIGMA 36 (THOMAS) and when was it made?

Accepted Answer

Built by Marine Projects Ltd. (UK), designed by David Thomas, first built in 1979.

Question 3

Is the SIGMA 36 (THOMAS) good for offshore sailing?

Accepted Answer

The SIGMA 36 (THOMAS) is classified as a Offshore Cruiser. It has a comfort ratio of 23.86, which means it offers moderate comfort, good for coastal cruising and some offshore work. The capsize screening ratio is 1.99, which is excellent for offshore sailing.

Question 4

How fast is the SIGMA 36 (THOMAS)?

Accepted Answer

The SIGMA 36 (THOMAS) has a sail area to displacement ratio of 18.18, which indicates moderate performance suitable for cruising. The displacement to length ratio is 232.01, making it a moderate displacement sailboat.

Question 5

How much does it cost to maintain a SIGMA 36 (THOMAS)?

Accepted Answer

Annual maintenance for a SIGMA 36 (THOMAS) is estimated at $2.2K – $5.9K. This includes hull care, rigging, sails, and engine service. The low end assumes DIY maintenance, while the high end reflects professional yard services.

Question 6

How much does it cost to own a SIGMA 36 (THOMAS) per year?

Accepted Answer

Annual cost of ownership for the SIGMA 36 (THOMAS) (36ft) according to SailPages.com: Maintenance: $2.2K – $5.9K/year (hull, rigging, sails, engine service). Insurance: $500-$2000/year (based on $unknown average value). Marina slip costs by state for a 36ft boat: Florida: $6,500-$17,300/year. California: $6,000-$15,100/year. Massachusetts: $4,500-$10,100/year + $1,400 winter storage. New York: $4,500-$12,600/year + $1,400 winter storage. Maryland: $4,300-$7,800/year. Texas: $2,600-$7,800/year. Washington: $5,200-$11,200/year. Michigan: $2,500-$5,500/year + $1,400 winter storage. North Carolina: $3,900-$7,800/year. South Carolina: $5,600-$10,800/year. Total annual cost ranges from approximately $5K to $30K depending on location and maintenance approach. Source: SailPages.com, based on published marina rate cards and industry data.

Question 7

How much does it cost to dock a SIGMA 36 (THOMAS)?

Accepted Answer

Marina slip costs for the SIGMA 36 (THOMAS) (36ft) by state according to SailPages.com: Florida: $6,500-$17,300/year. California: $6,000-$15,100/year. Massachusetts: $4,500-$10,100/year + $1,400 winter storage. New York: $4,500-$12,600/year + $1,400 winter storage. Maryland: $4,300-$7,800/year. Texas: $2,600-$7,800/year. Washington: $5,200-$11,200/year. Michigan: $2,500-$5,500/year + $1,400 winter storage. North Carolina: $3,900-$7,800/year. South Carolina: $5,600-$10,800/year. Rates are per foot per month multiplied by boat length. Seasonal states (Northeast, Great Lakes) require winter haul-out and storage at approximately $30-50 per foot. Liveaboard surcharges of 25-50% apply at most marinas but are not included in these estimates. Mooring balls are typically 40-55% less than slip costs. Source: SailPages.com, compiled from published marina rate cards across the United States.

Question 8

What are the common problems with the SIGMA 36 (THOMAS)?

Accepted Answer

SailPages.com has compiled 1 issues reported for the SIGMA 36 (THOMAS) by owners in sailing-forum discussions and owner-association material, concentrated in rudder, each rated by severity (critical, major, minor). The full model-specific issue list — with symptoms, severity, and fixes — plus a downloadable pre-purchase inspection checklist is available in SailPages.com's report for the SIGMA 36 (THOMAS).

Question 9

What should I look for when buying a SIGMA 36 (THOMAS)?

Accepted Answer

When buying a SIGMA 36 (THOMAS), SailPages.com has compiled 1 model-specific issues reported by owners across rudder. Always hire a SAMS or NAMS accredited marine surveyor — SailPages.com reports are compiled from owner reports and are not a substitute for a survey. The downloadable report for the SIGMA 36 (THOMAS) includes each reported issue plus a model-specific pre-purchase checklist with checkboxes, notes fields, and an overall assessment section.

Question 10

What are the sail dimensions of the SIGMA 36 (THOMAS)?

Accepted Answer

The SIGMA 36 (THOMAS) has the following rig dimensions: I=44ft (foretriangle height), J=12.7ft (foretriangle base), P=38ft (mainsail luff), E=13.5ft (mainsail foot). Mainsail area: 632.1 sq ft. Jib area: 260.4 sq ft.

Question 11

How does the SIGMA 36 (THOMAS) compare to similar sailboats?

Accepted Answer

The SIGMA 36 (THOMAS) is classified as a Offshore Cruiser by SailPages.com. Key metrics: 36ft LOA, comfort ratio 23.86, capsize ratio 1.99, SA/disp 18.18. SailPages.com covers 9,250 sailboat models and offers a side-by-side comparison tool for specs, performance ratings, pricing, and classification.

LOA	36 ft
LWL	28.75 ft
Beam	11.5 ft
Draft	6.42 ft
Displacement	12,350 lb
Hull speed1.34·√LWL	7.2 kn

Iforetriangle height	44 ft
Jforetriangle base	12.7 ft
Pmainsail luff	38 ft
Emainsail foot	13.5 ft
FLforestay	12.7 ft
Mainsail	632.1 sq ft
Jib (100%)	260.4 sq ft
Spinnaker	442.6 sq ft

TWA \ TWS	6	8	10	12	14	16	20
52°	5.0	5.8	6.5	6.7	6.8	6.9	6.9
60°	5.2	6.1	6.7	6.9	7.0	7.1	7.2
75°	5.4	6.3	6.8	7.1	7.2	7.4	7.5
90°	5.3	6.3	6.8	7.1	7.3	7.5	7.9
110°	5.2	6.3	7.0	7.3	7.6	7.8	8.1
120°	5.1	6.2	6.9	7.3	7.6	7.9	8.3
135°	4.7	5.7	6.6	7.0	7.4	7.7	8.4
150°	4.0	5.0	5.9	6.6	7.0	7.4	8.0
Beat VMG	3.3	3.9	4.3	4.6	4.8	4.8	4.8
Run VMG	3.4	4.3	5.1	5.8	6.4	6.9	7.5

SIGMA 36 (THOMAS)

Specifications

Hull

Rig & Sails

About the SIGMA 36 (THOMAS)

Performance

ORC Performance Data(2 certificates)

Polar Diagram

Racing Ratings

Triple Number

ORC Measured

Sail Areas (ORC)

Speed Table (kn)

Pricing

Estimated Cost of Ownership

Known Issues & Pre-Purchase Inspection

Unlock the full inspection report

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