23m Steel Dive/Work Catamaran - For Sale by Tender

Listing ID - 5075
Description	23m Steel Dive/Work Catamaran
Date Launched	1978 / Refit: 2008
Length	23m (75ft 5in)
Beam	9.7m (31ft 9in)
Draft	2.9m (9ft 6in)
Note	Engine: 2x Scania
Location	New Zealand
Broker	John Kearns john.kearns@seaboatsbrokers.com +64 21 400 805
Price	FOR SALE BY TENDER
Price Notes	Tenders close on 28th May, 2026 at 1400 NZST.
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On instructions from the Owner, this vessel is now offered for sale by Public Tender. The seller retains the right to sell the vessel prior to the close of tenders. Tenders close on 28th May, 2026 at 1400 NZST.

23-metre Steel Catamaran built 1978 in New Zealand, with a well proven track record as a dive/work vessel in current Maritime New Zealand survey. Designed for flexibility and built for endurance, this well maintained versatile workhorse is now available for sale.

With a 9.7-metre beam, the vessel offers a large work platform for a 23m vessel, featuring a 10-ton deck winch, a remote-operated Hiab X-HiDuo 258 crane, moon pool and a 10-ton aft gantry and winch combination suitable for hauling heavy equipment or deploying and retrieving ROVs.

Powered by twin Scania DI12 520kW marine engines, close coupled to Twin Disc CB MG50955C reduction gearboxes, providing a service speed of 7.5 knots and 9 knots at 100% MCR.

Bow Thruster is fitted in port hull.

Electrical power is provided a Isuzu/Zenith 60 kVA generator (New 07/23) and a Yanmar/Mase 17.4 kVA generator. The vessel has 20,000-litre fuel capacity and 12,000-litre water capacity for long-range capabilities for extended research or diving expeditions.

Accommodation is provided for up to 15 crew in 7 cabins comprising 1 x single berth cabin, 5 x 2 berth cabins and 1 x 4 berth cabin. The galley is equipped with an 8-burner stove, oven, fridge, and chest freezer, plus dry store. The ablution block has two toilets and two showers, plus full laundry and ample storage.

Bridge electronics include Furuno TZ Touch Screen, Koden K6P-193 Mk2 GPS, Koden CVS-118 Depth Sounder, Autopilot and Compass, Kobelt pneumatic engine controls

Boat type: Multi-purpose Catamaran

LOA: 23m

Beam: 9.7m

Draft: 2.9m

Displacement: 125 tonne

Designer: Nautilus Marine, NZ

Builder: Nautilus Marine, NZ

Launched: 1978

Refit: 2008

Keel Type: Catamaran

Boat Colour: Blue, White and Gray

Hull Material: Steel

Deck Material: Steel

Engine: Scania DI2 x2 – 520kW combined

Cruising Speed: 7.5 knots

Max Speed: 9 knots

Hours: Approx. 28,000

Propulsion: 40 x 31 4B RH3” standard taper

Transmission: Twin disc CB MGS0955C

Accommodation

It is equipped with 5 berths between both hulls.

1x four berth cabins

5x 2 berth cabins

1x single berth cabin

The head has 2x toilets, 2x showers, 2x sinks, full laundry and dryer set up with sink and drinking water tap. Vast storage space.

Galley

The large galley has an 8-hob electric oven top and an oven, 1x microwave oven, toaster, jug etc. 1x prep bench, 1x wash / prep bench and sink. Hot and cold-water tap. Ample and sea worthy storage space for included cookware and serve ware. Small pantry space for dry foods. All in good used condition.

Refrigeration

1x full height single door fridge + chest freezer

Miscellaneous Galley Equipment

2x Outdoor BBQs

Engine Description

Scania DI12 x 2 – 520kW combined

Hydraulic power pack – Hyundai Seasal #H380 (hours 3575 and installed 10/2019)

Genset 1: Yanmar / Mase 2000TB (hours 3341 and installed 03/2021)

Genset 2: Isuzu / Zenith M6605.3 (hours and installed 07 2023)

Port Main Engine / Gearbox coupling replacement – 16/6/2022

Compressor for pneumatic throttle control replaced 31/7/2023

Mechanical Details

1x port side hydraulic bow thruster

Tankage

7x fuel tanks with total fuel capacity of 20,000 litres.

3x water tanks with total water capacity of 13,000 litres

Cleaned and re-lined in 2023 (see survey report)

1x black water tank with total capacity of 3000 litres. Cut out ad replated in 2023 (See survey report)

Electrical System

Genset 1: 17.4kva

Genset 2: 60kva

Radio Batteries: 2x (replaced 02/2024)

Start Batteries: 2x per engine

8 new 6 Voth AQM Batteries (house bank) installed 1/12/2021

Electrical Equipment

Single and 3 phase power

Inverter that charges batteries while running.

Spotlight

Electrical spares compartment with miscellaneous switches, bulbs, fuses etc

Navigation Equipment

Furuno TZ touch installed 19/3/2021

GPS Koden K6P-193 MK2.

Depth Sounder Koden CVS-118

Autopilot

Compass

Radios

VHF ICOM IC-M200VHF (replaced 02/24)

Entertainment

Stereo & TV

Construction Details

Replated starboard bow 2023 (see survey report)

Deck Equipment

A-frame. We reinstalled original A-frame in 2018.

Has 2x 5 tonne hydraulic rams and a 10 tonne winch.

Remote operated Hiab 258 x hi-duo crane, installed 27/6/2019

New Maintenance compressor 15/7/2020 Capstan

Steering

Hydraulic / Electric toggle steer

General Equipment

ROV room / workshop

Paint and maintenance workshop with spare engine parts and hydraulic hoses

2x bow lockers with spare ropes and floats

Cargo Gear

A variety of lifting strops and 2x 4 legged lifting chains.

Working load limit 3.15T single 6.7T 4 leg

Survey Details

Currently in-shore survey for 22 pax

Pursued off-shore survey and only needed life rafts in tests and SSB radio

Safety Equipment

3x life rafts

1x 406 EPIRB manual

Scale 1 medical stores & first aid kit

Flares x 6 (4 parachute) exp 06/26

Fixed Fire fighting equipment: ERCO system 3x 33kg CO2 tanks

3x 10-man danbuoys, 4x life rings, 2x ropes, 1 light

22x 150n with lights

Bilge System – Automatic operation

Tenders

3.8-meter punt with 15hp outboard

Maintenance

Full repaint of the exterior in 2021 and 2023 antifoul

Exclusion

Currently missing anchor and chain.

Vessel History

It is a well proven multi-purpose vessel that has an extensive history in the dive and salvage, oil and gas and aquaculture industries throughout NZ and around the Pacific.

Comments

Estimated fuel burn per hour at cruising speed 100 l/h

On instructions from the Owner, this vessel is now offered for sale by Public Tender. Tenders close on 28th May, 2026 at 1400 NZST.

Tenders are to be submitted within the above time frame to SeaBoats International as detailed in the tender documents. The seller retains the right to sell the vessel prior to the close of tenders.

The vessel is lying at the Port of Marlborough, New Zealand. To receive an Invitation to Tender and arrange inspection please contact:

John Kearns at SeaBoats International

Mobile: +64 (21) 400 805 or john.kearns@seaboatsbrokers.com

The details of all vessels are offered in good faith but we cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. Any buyer should instruct their agents, or their surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to sale, price change, location or withdrawal without notice.

23m Steel Dive/Work Catamaran - For Sale by Tender

Listing ID - 5075