WHITMARSH HIGH PERFORMANCE RIBS Whitmarsh ST115

Built on a racing-derived Whitmarsh hull, Whitmarsh ST115, AROHA II is as sharp to helm as she is to look at. With twin supercharged Mercury Racing Verado 400Rs, she’ll sit at 45 knots all day and touch 55 when you open her up. She’s a great-looking boat too, with a white hull, grey tubes and a grey hard top. There’s a big sunpad up front, two racing helm seats, and a large U-shaped sofa aft for the guests, with a Rockford Fosgate sound system to keep the party going. She has been run and maintained by a superyacht chief engineer for the last five years, and this year she’s had new upholstery and new covers, with fresh Flexiteek laid last spring. With a factory-fitted tow bridle AROHA II is a quick, stylish tender ready for her next yacht, and she’s just as at home as an outrageously fast day boat for anyone who wants to get from A to B faster than they can blink.

Construction

RCD Status: The yacht conforms with the essential safety requirements of RCD II (2013/53/EU) (Recreational Craft Directive) and is categorised category C.

 

Hull, Deck & Superstructure Construction:

• Racing-derived GRP planing hull with Vinylester/Kevlar lay-up.
• White hull.
• Grey inflatable tubes with Kevlar lay-up, in particularly good condition.
• White GRP superstructure with grey hard top.
• Height above waterline approx 1.75m / 5’9”.
• Large helm console.
• Flexiteek decking. New spring 2025.
• Tow bridle fitted at the factory.

Machinery

Engine & Gearboxes:

• 2 x Mercury Racing Verado 400R 400hp supercharged petrol outboards (800hp total).
• Hydraulic jack plates.

 

Maintenance & Performance:

• Engine hours – approx 1,500 hours as of October 2026.
• Engines last serviced 2026. Basic Service, engine oils filters etc., March 2026.
• Service records limited – maintained by the mothership’s chief engineer.
• Cruising speed – approx 45 knots.
• Maximum speed – approx 55 knots.

Propulsion & Steering:

• Mercury 19” 3 blade propellors.
• Mercury Verado power-assisted steering.
• Bow thruster. Currently not working.
• Stern thruster. Currently not working.

 

Other Mechanical Equipment:

• Kiekhaefer trim tabs.

Electrical Systems

Voltage Systems:

• 12vDC system.

 

Battery Banks:

• 2 x Engine start, 1x domestic battery, 1 x thruster battery.

 

Battery Chargers:

• 2 x Victron smart chargers 30Ah output.

 

Alternators:

• 70Ah engine-driven alternator on each outboard.

 

Shore Power:

• 230V shore power.

Plumbing Systems

Fresh Water & Water Heating System:

• Fresh water system. Retractable deck shower.

Bilge Pumps:

• 3 x 12vDc pumps, two in the main bilge and one in the deck pump out box.

Tankage

Fuel:

• Total capacity of approx 650 litres.

Fresh Water:

• Total capacity of approx 50 litres.

Navigation Equipment

• Raymarine Axiom chartplotter at the helm.
• Raymarine radar.
• Depth sounder.
• AIS Class B.
• Raymarine VHF.

Domestic Equipment

Heads/Showers:

• No heads.
• Retractable deck shower.

Entertainment:

• Rockford Fosgate sound system.

Lighting:

• Underwater lights.
• Navigation Lights 12vDc with back up navigation lights and towing strobe.

Accommodation

Summary of Accommodation:

• Open boat with seating for twelve guests plus crew. No cabins.
• Light grey upholstery with dark grey accents. New 2026.

 

Description of layout from forwards:

• Large sunpad at the bow with storage beneath, and a forward-facing seat in front of the helm console.
• 2 x Large racing-style helm seats with flip-up bolsters.
• Large U-shaped sofa aft, with an aft-facing bench on the back of the helm seats.
• Large T-top above helm and aft facing bench seat.

Deck Equipment

General:

• Grey hard top.
• Boarding post.
• Ultra Marine built-in telescopic swim ladder.
• Additional stainless steel swim ladder.
• Flexiteek decking.
• Towing bridle with 60m tow line.

Anchoring & Mooring Equipment:

• Ultra Marine anchor and windlass system with remote control at the helm.
• Full set of quick-attach fenders.

Covers, Canvas & Cushions:

• Full set of covers. New 2026.
• SeaSmart aft cockpit mesh bimini.
• Light grey upholstery with dark grey accents. New 2026.

Safetry Equipment