Otam GTS 85, the 25-meter long day boat that exceeds 45 knots


Give or treat yourself to a subscription to Boats in Motion print + digital and for only 39 euros a year you get the magazine at home plus read it on your PC, smartphone and tablet. With a sea of advantages.

Power boats like the Otam 85 GTS bring everyone together. Aggressive, streamlined design, some teak on the deck and a cruising speed of over 35 knots. On a spring or summer day, when there is no wind except a slight breeze, imagine yourself at the helm speeding around the coast. What more could you ask for?

Otam 85 GTS

This boat, an Otam one-off, is the result of research and development, design and engineering work by Otam and Marine Design & Services Interior design with the layout, styling and exteriors custom conceived by French designer Joseph Dirand.

One of the treats aboard this super boat is the full-beam master-suite positioned amidships that transforms the 85 GTS into a loft. A one-off fast cruiser powered by a pair of 2600-horsepower MTUs and Arneson transmissions, capable of reaching and exceeding a top speed of 45+ knots and a cruising speed of 35+ knots. The design and engineering are the result of the experience and collaborative effort between Gianfranco Zanoni CEO of OTAM (Director of Production and tester as a mechanical engineer as well as World Champion in off-shore)and and Umberto Tagliavini of Marine Design & Services.

The pair of Otam-patented six-blade propellers designed four-handedly with Rolla ensures an uncommon efficiency of 16 liters per mile at a cruising speed of 37 knots, excellent maneuverability, and allows sailing with maximum comfort in total absence of vibration at all speeds up to 50 knots.

Paris-based firm Joseph Dirand Architecture took care of the interior design and layout and the cockpit styling and layout in every detail. Max Riedl of Germany’s Cornelsen & Partner is the Technical Surveyor representing the owner along with Damien Sauvage of Sauvagepowerboats as commissioning supervisor.

The two center tables can be lowered so as to create two large sheltered sundecks. The layout has been simplified to allow moving around the deck safely and unimpeded. An 85 Semi Open, GTS then, capable of sailing always in total safety and in the absence of turbulence ensuring maximum comfort on board even at the top speed of 50 knots.

The shape of the semi-open hard top, is made of advanced composite materials and shaped following the style of the owner’s specification. It integrates engine vents, protects spaces served by grills for outdoor dining, and perfectly conceals the canopy opening mechanism that is also absolutely custom. The challenge has been to provide spaces that are protected, yet airy and bright. The opening of the superstructure has been extended to the maximum just to enjoy the direct light while remaining sheltered from the wind.

On board the 85 GTS there are two large owner’s cabins forward and amidships with maximum beam, as well as a galley and open-plan lounge/lounge served by another guest bathroom; the crew is accommodated forward with totally independent access from the VIP and Guest areas.

Technical characteristics of the boat: Otam 85 GTS

  • LOA: 25.85 mt;
  • Maximum beam: 6.00 mt;
  • Full load displacement: 63 t;
  • Empty displacement: 57 t;
  • Fuel tank: 8000 lt;
  • Water tank: 1000 lt;
  • Gray water tank: 350 liters;
  • Black water tank: 350 lt;
  • Main Engines: nr° 2 x MTU M96L 2600 Hp@2450 RPM; Gear Boxes nr 2 x ZF 3070 Rid 2.5:1;
  • Transmissions 2x Arneson Drive ASD 15°1L;
  • Cruising speed 37+ knots;
  • Maximum speed 45+ knots;
  • Autonomy: cruising speed 350+ mn;



To stay up-to-date on all the boating news, selected by our editorial staff, sign up for the Motor Boats newsletter! Just click the link below, accept the Privacy Policy, and click the “Subscribe Me” button. You will then receive the best powerboat news on your email, twice a week! It’s free and you can unsubscribe at any time, no obligation! CLICK HERE.



Leave a Comment

Your email address will not be published. Required fields are marked *

Are you already a subscriber?

Sign up for our Newsletter

Join the Sailing Newspaper Club

Powerboats, its stories, from small open to motoryachts. Sign up now for our free newsletter and receive the best news selected by the editorial staff each week. Enter your email below, agree to the Privacy Policy and click the “sign me up” button.

Once you click on the button below check your mailbox



You may also be interested in.

Dracan 42 Sport Top

Dracan 42 Sport Top (12 m), the super-spacious weekend boat

Catamarans, of all sizes and for all uses, are now an increasingly common feature of the power boating market. And on closer inspection. Admittedly, there are notable differences from more traditional solutions, but the gain made in terms of onboard

Ranieri Cayman 33.0

Ranieri Cayman 33.0 Executive (10 m) is the new day boat

The rib scene is a vast one, populated by inflatable boats of all sizes and dimensions, from small tenders to maxi-cabin cruisers, from purely service hulls to those designed to meet every need required by even the simplest daily outing.