sonata yacht specifications

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About the sonata 6.7  .

The Sonata 6.7 is a small recreational keelboat, built predominantly of fiberglass. It has a fractional sloop rig, an internally-mounted spade-type rudder and a fixed fin keel. It displaces 2,544 lb (1,154 kg) and carries 952 lb (432 kg) of ballast. The boat has a draft of 4.92 ft (1.50 m) with the standard keel. There was a lifting keel version produced as well. The design has a hull speed of 5.9 kn (10.9 km/h).

United States

2,544 lb (1,154 kg)

4.92 ft (1.50 m)

Sonata Yachts

21.98 ft (6.70 m)

19.36 ft (5.90 m)

8.20 ft (2.50 m)

952 lb (432 kg)

internally-mounted spade-type rudder

Rig / Sails

Fractional rigged sloop

128.45 sq ft (11.933 m2)

95.74 sq ft (8.895 m2)

224.20 sq ft (20.829 m2)

24.74 ft (7.54 m)

7.74 ft (2.36 m)

27.10 ft (8.26 m)

9.48 ft (2.89 m)

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• Sailboat Guide

Sonata 8 is a 26 ′ 2 ″ / 8 m monohull sailboat designed by Gary Mull and built by Investigator Yachts PTY.LTD.(AUS) starting in 1979.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

Raced as a one-design class in Australia for a time. Fixed keel versions also available - draft:1.6m

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Review of Sonata 6

Basic specs..

The boat can sail close to the beach as the draft is just 0.24 - 0.34 meter (0.79 - 1.09 ft) dependent of the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Sonata 6 is 2.15, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 5.6 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Sonata 6 is about 73 kg/cm, alternatively 412 lbs/inch. Meaning: if you load 73 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 412 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is a Ballast Ratio?

What is Displacement Length Ratio?

What is SA/D (Sail Area Displacement ratio)?

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 14m 2 (150 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

Are your sails worn out? You might find your next sail here: Sails for Sale

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.

We are always looking for new photos. If you can contribute with photos for Sonata 6 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

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Meet Project Sonata, a Rule-Breaking 351-Foot Sailing Yacht That Cruises Like a Luxury Liner

If ever built, sonata would be a first for sailing superyachts. it would have high-tech sails, but would ride more like a motoryacht., julia zaltzman, julia zaltzman's most recent stories.

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What do you call a superyacht concept that takes the progressive learnings from the world’s leading new builds and packs them together in one visionary design? You call it Project Sonata. With three DynaRig systems inspired by the legendary sailing yacht Black Pearl , an inverted bow to slice through waves and enough space on board to compete with a motoryacht, could the 351-foot hybrid sailing yacht have it all?

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Project Sonata is the work of emerging Swiss studio Valentin Design. Headed up by industrial designer Valentin Weigand, winner of Young Designer of the Year 2020, and naval architect Romain Acquaviva, the duo have their eyes set on a more sustainable, smarter, and buildable yacht.

“Our aim is to create a sailing superyacht that is more accessible to clients than the ones currently in the water,” Weigand told Robb Report . “Many clients are scared off by how complicated they perceive sailing yachts to be, requiring large numbers of crew and complicated rigs. We want to offer something that combines the joy of sailing with the ease and comfort of a motoryacht.”

The master stateroom, encased in a glass bubble, offers immediate access to the outdoors.  Courtesy Valentin Design

Sustainability is also key to the concept. Two diesel electric engines generate recuperative energy through the yacht’s propellers while sailing, supplying enough power for the hotel load and to charge its Lithium-Sulfur battery pack. The 4MW batteries, developed by Oxys Energy, are free of heavy metals, such as cobalt, and are considered safer than Li-ion batteries.

The pair have strengthened their proposition by drawing on the expertise of Derek Munro, director at Divergent Yachting, who was instrumental in the construction of Oceanco ’s groundbreaking build Black Pearl .

“Derek has first-hand experience on what can be optimized or simply didn’t work with Black Pearl ,” said Weigand, “and we’ve worked that into the design of Project Sonata to eliminate those points.”

The beamy exterior looks more like a motoryacht than a sailing vessel, with access to the outdoors and water.  Courtesy Valentin Design

What works includes a 16-foot retractable keel that saves 6.5-feet of draft when required. The considerable DynaRig is low in maintenance yet highly durable, meaning a smaller crew is required. And, like Black Pearl , the tips of the masts can be unmounted to give enough clearance to sail under the Bridge of the Americas, and access the Pacific Ocean through the Panama Canal.

“ Black Pearl’s masts underwent three years of engineering and are proven to be highly efficient,” said Weigand. “By using the same molds on Project Sonata, we save time and money. In the same vein, the seating arrangement aboard Black Pearl is not ideal for heeling. We’ve ensured all exterior decks have been designed with heeling in mind.”

That said, Project Sonata has also undergone computational fluid dynamics studies to ensure it performs when sailing without heeling too much. “Most sailing superyachts’ main functions are regattas, which means they are super-fast, super light and heel a lot,” Acquaviva told Robb Report . “This can be really scary for owners who are used to stability and comfort, so our design prioritizes the guest experience. Our inverted hull extends the waterline length and cuts through waves.”

Courtesy Valentin Design

At 2,992 gross tonnes, the interior volume is sizable, complemented by features that follow the current trend for a connection to the outdoors. “The only thing our design lacks is a large swimming pool, which requires too much space on a sailing yacht,” said Weigand. “We’ve mitigated that with multiple exterior platforms to access the sea itself.”

A large sun deck affords alfresco dining. On the interior, glass is king, creating a design without visual borders. The master stateroom, spread across two decks, is virtually encased in a glass bubble. The VIP cabin enjoys direct access to its own private beach club, making a novel charter proposition. A double height atrium in the formal dining area speaks of elaborate guest entertainment. This also supports the studio’s intention to make the forward areas formal, so as guests move aft the more causal the design becomes.

Project Sonata, presented to the world by Ocean Independence, is a bold proposal from a studio made up of keen sailors, but whose sailing yacht designs to date have been limited to the 50-foot range. But that hasn’t deterred the dynamic pair.

Sonata’s inverted bow is as distinctive as its masts.  Courtesy Valentin Design

“I’ve been sailing on boats since I was kid and worked in refit and construction for over 12 years,” said Acquaviva. “I understand what an owner wants from a sailing yacht, but equally what the crew need. When combined with visionary design and fully engineered naval architecture, we believe that’s a winning formula.”

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Latest news

Entries Open for 2024 Sonata National Championships Hosted by Medway YC

The Sonata National Championship 2024 online entries are now open. The Championships will be held between Sunday 11th and Wednesday 14th August 2024 at Medway Yacht Club. More »

21 Feb 2024

Windermere Winter Series Report

Seven Sonatas are taking part in the 2023 IRC GBR Inland Championships on Lake Windermere. More »

Winners Decided At The 2023 Sonata National Championship

The 2023 Sonata Class National Championship [their 46 th ] came to a close at Parkstone YC, 18 boats travelled to the event with top teams from around the country descending on Poole Harbour from as far afield as Scotland and Newcastle and some more local boats from the Solent, Christchurch and Weymouth. The first three days of racing provided light variable conditions making life difficult for the race committee who managed to More »

Light Wind Battle For The Sonata Southern Rose Bowl

Six races were scheduled across the two days with light North Easterly winds forecasted. Saturday got underway on time with Race Officer Tony Bedingfield laying his start line just off East Cowes. Three races were completed in 5 9kts of E/NNE breeze, More »

30 May 2023

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Hunter Sonata Yacht / Sailboat

Hunter Sonata Yacht

The Hunter Sonata is a small racer-cruiser yacht built in Britain between 1976 and 1990 by Hunter Boats Limited to a high specification. It is a very seaworthy and speedy boat, especially in relation to its size. Over 400 Hunter Sonata were made, demonstrating its popularity and its design remains timeless.

The Hunter Sonata was designed by David Thomas and it has a glass-fibre hull and an iron keel. It has four berths and two further bunks meaning it can accommodate a family or four adults comfortably. Hunter Sonatas were built offering several different keels for different sailing performances, including a twin keeled version and lifting keel and fin keel versions.

The Hunter Sonata has RYA National Status Class, and the yacht remains a leading One-Design cruiser-racer even though Hunter no longer builds to this design. Many races have a Sonata class, illustrating the popularity of the boat for racing, and the Hunter Sonata performs strongly when tested. The boat can comfortably be sailed in difficult conditions and also cruised in as a holiday yacht.

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Length : 6.90m Beam : 2.60m Weight : 1115kg Sail Area : 19.5m2 Berths : 4

Sonata Yacht Association

for Sonata Yacht Owners

The home of Sonata Yachts

Since 1978 the Sonata Yacht Association of Victoria has operated successfully as an association for owners of Sonata Trailerable yachts. The membership base is primarily in Victoria with a growing membership in most other states of Australia.  To reflect this we are now known as the ‘Sonata Yacht Association’ (SYA).

The Sonata Yacht Association caters for all yachts built from a number of “Sonata” hullshapes. These comprise; Sonata 6, Sonata 6.3, Sonata 6.7, Sonata 7, Sonata 8, Sonata 26, Southern Cross 23 & Northwind 7 yachts.

T h e Sonata Yacht Association is affiliated with Australian Sailing, which represents all Class Associations and Yacht Clubs in Australia. P leas e enjoy our website. If you wish to  contact the association details are on the  Contacts page.

2024 Sonata Regatta – 10-11 February

Details including the Notice of Race and Entry Form are now available from the Racing page .

Our Membership Application Form is available from the Documents page.

Found an error on the web page 🙁 Please contact us at [email protected]

Sonata Software partners with Microsoft Azure to drive enterprise GenAI adoption

Sonata Software has announced the integration Microsoft Azure AI services into its enterprise GenAI offering.

The news follows a 30-year partnership between the two companies and aims to accelerate the adoption of responsible-first AI solutions for enterprises.

Sonata Harmoni.AI  is the company's AI tool which offers a range of industry solutions, service delivery platforms, and accelerators using GenAI.

The integration of  Sonata Harmoni.AI  with Microsoft Azure AI fuels the adoption of GenAI solutions and allows customers to differentiate in the marketplace, enhancing both customer experience and operational efficiency, the company said. 

"Our 30-year collaboration with Microsoft underscores our dedication to empowering customers for success in the evolving AI landscape and modernisation journey," said Samir Dhir, managing director and chief executive officer at Sonata Software. 

Dhir said integrating Microsoft Azure AI with Harmoni.AI represents a pivotal advancement in their partnership, allowing Sonata's AI offering to enable distinct use cases, foster secure innovation and boost productivity. 

"We believe the GenAI offerings resulting from this integration will empower developers and organisations to swiftly create responsible, intelligent, and forward-looking solutions using intuitive APIs and models," Dhir said.

AI is viewed as the most disruptive technology among businesses, but some scepticism of the technology remains,  according to a new GlobalData survey.

The  Thematic Intelligence: Tech Sentiment Polls Q4 2023 survey , carried out across GlobalData's network of B2B websites, found that 78% of respondents believe that AI will cause either "significant disruption" or "slight disruption" in the future, with 54% of respondents noting that they were already experiencing the impacts of the technology.

AI is followed by cybersecurity and robotics in terms of how disruptive businesses view the technologies as being, leaving augmented reality and the metaverse lagging.

"Sonata Software partners with Microsoft Azure to drive enterprise GenAI adoption" was originally created and published by Verdict , a GlobalData owned brand.

The information on this site has been included in good faith for general informational purposes only. It is not intended to amount to advice on which you should rely, and we give no representation, warranty or guarantee, whether express or implied as to its accuracy or completeness. You must obtain professional or specialist advice before taking, or refraining from, any action on the basis of the content on our site.