Tanielle is a graceful 24-meter ketch meticulously crafted using Stainless Steel grade SAF 2205 (Duplex).

Artist Impression

Showing her beautiful lines.

The keel completed.

Fitting Rudder entailed lifting yacht high enough to slide rudder in to bearings by lifting with crane.

Lloyds checking the keel welds.

Work goes on rain, hail or shine.

Fitting hull to keel.

Removing the temporary keel cover plate which was required for the brief crossing of Sydney Harbour, from launch at Sydney City Marine to Woolwich Dock.

At Woolwich Dock, Bill contemplating his creation.

At Woolwich dock waiting to get her keel on.

Tanielle arrives as Sydney City Marine.

She heads to the City and reaches Pyrmont, Sydney.

On the road at Middle Dural.

Flying up and over the gumtrees.

Tanielle is finally leaving her build shed.

Tanielle is now ready to transport to the launch site.
The cradle she sits on has steel wheels that will allow the cradle to be towed to the shed doors with the yacht poking out to the chainplates. A 300 ton crane will then lift the forward part and pull her on the aft cradle wheels the lift her fully up and over the building shed to lower her onto the special trailer with 20 self steering wheels widening and lifting hydraulics and no goose neck.
Tanielle will then be launched, without her keel,  and with a 4m x 400 temporary cover plate to make her watertight, and towed across Sydney harbour to where she will be lifted.
There she will have the plate removed the keel welded in place.
The keel will slide into slots and there are stops to locate it.
Tanielle will the have all systems checked and go through the usual sea trials.

This bespoke Hoek-designed ketch, is based on his renowned Truly Classic 78 series, while adhering to the high standards of Lloyds classification. Its timeless design showcases elegant lines and exquisite brightwork, while below, it boasts a spacious and inviting interior – perfect for global voyages accommodating one or two couples, complemented by an additional two-bunk cabin suitable for children or crew.

Tanielle Statistics

Navigation

An array of advanced navigation facilities grace this vessel, with two navigation stations. Adjacent to the companionway, a dedicated chart area houses a 15-inch MFD display at the helm, providing access to charts, AIS, and Sonar functionality. Further enhancing navigation capabilities, the setup includes a Furuno FR10 Radar and an Icom M605 Euro VHF.
The below chart table has two 17-inch screens available, mirroring the display from the above helm station while offering additional features such as email and house management. For traditional chart enthusiasts, paper charts are thoughtfully stored under the table. The navigation arsenal expands with a separate Sailor VHF, an Icom M804 E SSB, Iridium 4000, Iridium Go, and Inmarsat C.

Accommodation

The accommodation features two spacious main cabins, each equipped with queen beds, private en-suite heads and showers, writing desks, wardrobes, comfortable settees, and an abundance of storage lockers and drawers. Strategically positioned at opposite ends of the vessel, these main cabins offer utmost privacy to occupants.
For visiting guests or occasional crew, double twin bunks and a day head with a shower are provided, ensuring the main cabins retain their exclusivity and private amenities.
Conveniently located, a generously sized wet locker offers forced warm air when needed, and just ahead is the well-appointed navigation station. Hot water is facilitated by a 75-litre Isotemp system, which can be powered either by the main engine heat exchanger or through a 240-volt power source.

Watermakers installed on board are Echotech units, capable of producing 100 litres of freshwater per hour each. One unit is belt-driven from the generator, while the other operates on 240 volts.
The vessel is outfitted with 4 Marine Air air conditioning systems, boasting a total of 70,000 BTU. One unit serves each of the forward and aft cabins, while two units are dedicated to the saloon. For heating, a Hurricane Diesel boiler efficiently warms the same designated areas, ensuring comfort during colder times and while sailing.

The Accommodation Plan as Built:

Main Saloon

Cockpit & Steering

The 5 NKE analogue displays are thoughtfully positioned over the companionway, and large repeaters are placed beneath the aft corners of the doghouse for optimal visibility.
Steering from the inside helm incorporates a Hydrive hydraulic pump, allowing for a fixed wheel position or a quick switch to feedback mode with just the press of a button.
The aft helm operates through a substantial cable system, flawlessly connecting to a custom-designed, sizeable quadrant, ensuring precise and reliable steering that is totally independent of the hydraulic steering.

Forward Cabin

Forward Head

Galley

Situated to starboard, the galley is an impressive size and designed with practicality and elegance in mind. It features a 5-burner GKN gas stove with an oven and grill, all securely mounted on custom gimbals. The granite bench tops showcase a stunning gold and white pattern, adding a touch of luxury.
Safety and convenience are paramount, as demonstrated by the large self-draining gas locker, capacious enough to house 45kg of gas bottles. A solid schedule 80 stainless steel pipe, constructed in a single piece, connects to the stove. Adding an extra layer of security, a Nereus gas detector equipped with three waterproof sensors ensures peace of mind.
Gas can be disconnected by a user-friendly shut-off valve activated at the stove or alternatively by a push of a button at the stove closing the solenoid in the gas tank.
Refrigeration is by Frigoboat with 115 ltr and 130 ltr fridges and a 150 ltr custom freezer utilising state of the art aerogel insulation. The galley is further equipped with a flatbed microwave and twin 316 stainless sinks, completing this culinary haven.

Crew Cabin

Crew Head

Master Cabin

Master Head

Engine Room

Construction

Constructed entirely from SAF 2205 duplex stainless steel, this includes the frames, plating, deck, deck houses, and cockpit, ensuring both durability and strength for the utmost sea-faring confidence. The sheer strength of the hull gives one great peace of mind, particularly when sailing amongst reefs or in ice. Not only is this exotic steel considerably stronger than normal boat steels, it also does not rust.

The lines plan was enlarged to the full size and their lines reduced in thickness to 1mm. These were then given a 300mm square grid as a check on the floor accuracy. This was then printed by a UV flatbed printed to 20mm MDF sheets to create the 6m x 4.8m lofting floor. We used this to lay out the laser cut frame pieces and weld them together.

All hull plates were laser cut to 0.1 mm accuracy.

All plans were submitted to Lloyds for approval and here we see some of their comments in red as well as their plan approval stamp.

Here all the deck hardware is installed and leads trialed before removing to sandblast and paint. Sail tracks, bollards and turning block bases are welded to deck to add strength and ensure watertight integrity.

The rudder also has to be fitted after transport. We modified the rudder to be a half skeg instead of a full skeg to give better speed, (the rudder acts as a brake) and to be more effective. The bumps divide the water flow and accelerate it between them. This gives greater flow attachment and means the rudder stall angle is improved from around 15 degrees to around 30 degrees.

Why SAF 2205 Stainless Steel

• High resistance to stress corrosion cracking in chloride bearing environment.
• High resistance to general corrosion pitting and crevice corrosion.
• High resistance to erosion corrosion.
• High fatigue strength.
• High mechanical strength.
• Good weldability.

The practical alternative was 5083 Aluminium so a comparison is useful.
From the chart it can be seen that the SAF 2205 plate is 3.0 x stronger than the 5083 plate but the welds are 4.4 x stronger.
The weight however is 2.93 x heavier than the 5083.
Therefore SAF 2205 is 21% stronger for the same weight.
It is also 3.3 x harder so ice and reefs would cause little damage. It will survive a collision with a container that would rip open the 5083 hull.

Inventory

Follow Special Vessel Tanielle on Instagram @svtanielle or email svtanielle@gmail.com for more information.

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