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2021 Nautitech 46 Open ‘Jadamama’- UNDER CONTRACT

$695,000 USD

Seller's Description

The Nautitech 46 Open truly encompasses Nautitech’s defining characteristics of comfort, performance and seaworthiness. This 46 Open comes with a sleek walnut standard interior, the addition of a sit down chart table and a lowered boom giving extra sail area and an even better sail aspect ratio. Building on the changing styles of cruising catamarans, increasing the already impressive performance and development based on owner feedback.

​’Jadamama’ with her original owner has carried out her fair share of adventures. Having started the journey from a home port in Ireland, the boat has sailed through the Pacific, island hopping and finally dropping anchor in New Zealand. It’s now time for a new owner’s dreams to be realised!

Launched in 2021 with VAT paid, this boat was fitted with both a range of factory extras, as well as many custom additions. Fully prepared for ocean passages and life aboard, the boat benefits from twin helm stations, twin Volvo 60hp diesel engines, 7Kw Onan Generator, 1000Ah lithium battery power bank, over 1.2kW solar, high capacity Watermaker, electric winches and a wide range of additional sails including a fully battened Mainsail, Self Tacking Jib, an Elvstrom Reaching Gennaker, North Sails Trade wind Sail and North Sails Code 65.

​’Jadamama’ has four spacious double cabins, each with its own en-suite shower room with electric toilet. The saloon features a convertible table for a great night watch position or an additional double berth. The galley is a chefs dream with Bosch four gas hob, Airlux gas oven, microwave and generous fridge and freezer capacity.

​’Jadamama’ has been optimized for sailing and prepared for long distances with ARC compliant safety kit and Iridium Certus 700 sat communications and back up Auto Pilot system. Hull underwater is protected with CopperCoat antifouling applied 12/22 and serviced recently during haulout and annual maintenance.

A Highfield 340 tender with 20hp Honda sits snugly on davits at stern.

Currently berthed in Northland New Zealand ‘Jadamama’ is ready for the next adventure and available for viewing. For further inventory information and other details please contact Jason at protected email



Marc Lombard
Bavaria Yachts
Nautitech Catamarans
# Built
FG infusion w/klegecell core


Length Overall
39 3 / 12 m
Waterline Length
39 2 / 11.9 m
22 8 / 6.9 m
4 5 / 1.4 m
17,200 lb / 7,800 kg

Rig and Sails

Reported Sail Area
979′² / 91 m²
Total Sail Area
Sail Area
Air Draft
67 3 / 20.5 m
Sail Area
Forestay Length

Auxilary Power

Fuel Type
Diesel X2
Fuel Capacity
119 gal / 450 l
Engine Hours


Water Capacity
119 gal / 450 l
Holding Tank Capacity


Hull Speed
11.4 kn
Classic: 8.39 kn

Hull Speed

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

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

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

11.44 knots
Classic formula: 8.39 knots
Sail Area/Displacement
>20: high performance

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.
<16: under powered
16-20: good performance
>20: high performance

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

<40: less stiff, less powerful
>40: stiffer, more powerful
100-200: light

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
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
<20: lightweight racing boat

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 Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
>2.0: better suited for coastal cruising

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)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
<2: better suited for ocean passages
>2: better suited for coastal cruising


Cabins – heads, standard 4 - 2
Berths, standard version 8
Mainsail, standard (approx.) 63 m2
Self-tacking jib, standard (approx.) 28 m2
No. of cabins - heads 3/4 - 2
Berths 6/8 (+ 2)
Heads 2

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