Author Archives: John Adams

Power Catamarans, Aluminum, 10.85M length, outboard engines, new project


48 Pax Ferry

Latest new build project is a confirmed order for three 10.85M aluminum power catamarans. There are three different versions to be built; Ferry, Dive boat and Excursion/Tour vessel.

The boats will be built to handle twin Yamaha outboards up to 350 horsepower and are to be designed for offshore use. Shown  are the clients’ desired lay-outs.

The design is by Naval Architects Australia and will be completed within a few weeks. Boats will be constructed using CNC kitsets to be cut by a Singapore company. Shipping from Singapore by container normally takes less than one week so we will be able to get this order started quickly.

These power catamarans can be equipped with inboard diesels if required.

Basic Specification for the three boats:

  • Length O/A:       10.850 meters.
  • Length Lwl:        8.88 meters.
  • Beam:                   4.80 or 4.50 meters.
  • Displacement:   4.0 tons (Lightship, approximate).
  • Draft, T:             0.30 meters.
  • V max:              40 knots [TBC].
  • V cruise:           28 knots [TBC].
  • Marine grade [5083 H116 Mill Finish DNV Cert] aluminum hull, deck and superstructure from CNC kitset. Plate thickness to be 6mm hull bottom and transom, 5mm hull sides/deck and 4mm superstructure. Non-skid for main deck to be checker-plate.

    Dive boat

    Configured as Dive Boat

  • Non-skid mat to foredeck.
  • Transom to suit outboard horsepower up to 350HP.
  • Interior headlining and cabin sides Formica finish.
  • Marine grade waterproof aluminum windows, 2 x side sliding opening, remainder fixed.
  • Waterproof access doors, one each at port and starboard side, one aft (2 sides half doors in the Excursion Cat).
  • Bow storage area with access doors under and deck hatches, one each at port and starboard side.
  • Self-draining floor through side and aft auto closing scuppers.
  • Stainless steel guardrail to foredeck.
  • Stainless steel handrails at cabin rear sides.
  • 6 x 10” aluminum cleats.
  • Stainless steel bollard on foredeck.
  • Heavy duty rub rail, full length each side.
  •  2 x 250 HP F250GETX Yamaha 4-stroke outboards (Or 2 x 300/350HP for additional cost).
  • Yamaha controls.
  • Hydraulic steering.
  • Cushioned seating for 30 pax and 1 crew in Ferry Cat, 24 pax and 1 crew in Dive Cat, 36 pax and 1 crew in the Excursion Cat, storage under, per Contractor design (seats with dive tank holders in the Dive Cat).
  • Helm seat with bolster.
  • Two full size toilets aft, 2 x Jabsco electric [12VDC] head (one bow in-the-hull toilet only in the Excursion Cat).
  • Anchor windlass 12VDC.
  • Jabsco fresh water pump, cold water.


    Open Tour or Excursion Boat

  • Manual pump for black water.
  • 4 x 2000 gph bilge pumps.
  • Heavy duty windscreen wiper.
  • Electrical panel 12VDC, 16 breaker and wiring, dual 12V charging sockets.
  • Battery 3 x switch panel, service, engine, parallel.
  • Batteries engine start x 2.
  • Navigation lights LED, USCG standard.
  • Interior lighting LED x 16 above the pax seating (4 only in the Excursion Cat), 2 above wheelhouse console, 1 in each forward storage area, 2 in every toilet.
  • Horn 12VDC.
  • Water proof LED lighting x 2 outside at rear of cabin.
  • Radar/GPS/Plotter/Echo Sounder installation – Owner supply.
  • Fuel 2 x 400 litres [211 gals].
  • Freshwater 320 litres [84 gals].
  • Black water 110 litres [30 gals].
  • Delta ‘fastset’ anchor, 20M chain [10mm], 30M rope [14mm].

Standard USCG safety equipment to include 3 x 1.5kg fire extinguishers, 4 x life rings, 33 x standard life jackets (12 additional for the Excursion Cat).

Coastal 28 For Sale – Reduced Price!

coastal 28 motor boatWe have one Coastal 28 available for sale. The boat has been in storage for two years and can be supplied with a brand new 200HP Yanmar engine.

Navy Blue hull with a white superstructure this sturdy vessel will make a very comfortable family cruiser or sport fisher.

Saloon seating/table converts to make a bed and there is sleeping room for two in the forward cabin. The saloon has a sliding door which allows full access to the large cockpit.

Priced at only USD 88,000 ex. works.

Enquire by email – info at boatsbycoastal dot com

Seating converts to bed coastal 28 interior
coastal 28 power boat Coastal 28 sport fishing boat
Coastal 28 for sale boats for sale

Note: some of the above pics are from a completed sister vessel.


  • Length overall – 28′ [8.53M]
  • Beam – 9′ 6″ [2.89M]
  • Draft – 1′ 9″ [0.53M]
  • Headroom in cabin at center – 6′ 6″ [2M]
  • Displacement, lightship 2,840kgs
  • Displacement, half-load 3,340kgs
  • GRP Hull, vinyl ester resin outer, blue gel-coat finish. Deck and superstructure isopthalic resin, foam core to hull sides and cabin, .
  • Interior gelcoat finish, Cherry timber throughout
  • Decks non-skid finish
  • GRP swim platform
  • Marine grade aluminium windows, forward centre push-out with gas strut, side windows sliding opening
  • Push-out forward, centre window with gas strut
  • Stainless steel guardrail 2/3
  • SS handrails at cabin rear sides
  • Transom cut-out guard rail
  • Teak or stainless steel handrails to cabin top
  • 200 HP Yanmar diesel engine + ZF 45A marine gear
  • 2″ x 316L Stainless steel propeller shaft
  • 4 blade NiBr propeller
  • Sunbrella cushions, Pacific Blue, Grey or Green
  • Helm seat with bolster
  • Full size toilet + shower, Jabsco manual head
  • Interior seating and storage in molded GRP
  • Isotherm Cruise 65 refrigerator 12VDC
  • SeaFirst hydraulic steering
  • Anchor windlass 12VDC
  • Jabsco fresh water pump, cold water
  • Transom shower
  • Manual pump for black water
  • Rule 1850 gph bilge pump
  • Engine bay exhaust fan
  • Heavy duty windscreen wiper
  • Morse controls
  • Electrical panel 12VDC, 16 breaker and wiring, single 12V charging socket
  • Navigation lights LED
  • Interior lighting LED
  • Reading lights in forward cabin
  • Diesel 560 litres [148 gals]
  • Freshwater 320 litres [84 gals]
  • Black water 110 litres [30 gals]
  • Racor fuel filter
  • Deep sea packing-less propeller shaft seal
  • Stainless steel anchor roller
  • Chain/rope locker forward adjacent to windlass
  • Delta anchor
  • Steel shipping cradle

New Website for Coastal Boats

Announcing the upgrade for our company website at After several years of the old site the decision to update was made and we searched for quite some time for a suitable IT company to do the work.

Thanks to the patience of Koyya Vickram Redde the CEO of RedIndian Software Teknologies and the expertise his company supplies we have now completed the site update.

We are positive that the new layout provides a very satisfactory and modern user experience with excellent readability and fast, easy to use navigation.boat builder Thailand Coastal Boats

We are also in the process of developing the land area at our new factory site but, of course, this is a much bigger and more expensive project which will be done on a step-by-step basis as required for expansion.

The new site is now live so please take a look and we welcome constructive feedback in the comments section on this blog.