Alubat Construction
We have attempted to show the complex construction process of the Ovnis
up to the interior fit out stage as these initial stages, working with the
raw aluminium alloy, are where the production process differs most markedly from
other production yachts. You can literally see an Ovni being built from the ground up.

We have numbered the photographs to enable visitors to this site to request individual
photographs in larger format using the reference number.
Please do this via the Contact Us section.

Copyright remains with North Sea Maritime Ltd at all times.

 

 

1. An Ovni hull jig: a separate hull jig creates
the outline shape for each Ovni model.

2. Ovni 435 hull jig with frames early stages:
The pre-cut aluminium frames are clipped to the
jig. The pieces are then tacked together to form
a frame. Three frames are used as internal chain
plates for the standing rigging.

 

3. Ovni 435 plating in progress: The frame joints
and longitudinal stringers are welded in position.
The 10mm base is the first to be welded.

4. Ovni hull plate: these plates are pre-fabricated
to the length of the boat and lifted into position by
the overhead hoist.

5. Ovni up turned hull during welding.

6. Hull plating is tacked in place before being
seam welded on both sides.

7. Red penetration dye is used to detect any
inconsistency in the seam weld.

 

8. Ovni 345 upturned hull with external hull
welds being faired off.

9. Ovni 435 completed hull pre-deck

10. Lead ballast blocks pre installation in an Ovni

11. Ovni 385 keel matrix which is pre-fabricated and
fitted within the hull jig at the early stages of build.

12. An Ovni 385 showing the galleries where the lead
ballast sits on rubber pads either side of the keel box.

13. Ovni 385: the lead ballast is fitted and then
encapsulated in resin to isolate it from the aluminium.
After the resin has cured an aluminium plate is
welded over the encapsulated ballast.

14. Ovni 435 hull looking aft with engine, fuel
and water tanks fitted.

15. Ovni 385 deck fabrication at an advanced stage.
Deck jigs are also used in the early stages of construction.

16. Ovni 435 deck with 'T' section deck beams
and frames being welded.

17. Ovni 385 cockpit fabrication. The cockpit and
decks are fabricated separately and the cockpit is
fitted to the hull before the deck.

18. Ovni 435 cockpit and 55 hp Volvo in
position in the hull. Framing is in place for
the aft cabin bunk tops.

19. Not bad photography - just grinding off the excess
weld on the deck seams.

20. Ovni 455cc hull and deck viewed from the
forepeak. Bunk framing and floor frames in position.

21. Ovni 455cc view aft before being washed off and
prepared for priming and painting.

22. An Ovni 435 with an optional aluminium watertight
bulkhead fitted between the forecabin and forepeak.

23. Rudder fabrication - the early stages. The round
holes are for the rudder plate and hydraulic ram bearings. The hydraulic ram is located in a slot at the aft end of the rudder.

24. Rudder assembly pre-painting, fitted to the hull
excluding the rudder blade.

25. Rudder blade with nylon rudder bush and friction
strips fitted. The arc machined out of the rudder allows
it to swing up when the Ovni is on a drying mooring.

26. Ovni 345 rudder assembly complete. The 36, 385
and 435 all have similar rudder assemblies.
The 455 and 455cc have twin fixed rudders.

27. Ovni 435 washing off pre-painting. Each Ovni
is washed down internally and externally. They are
then moved into the heated paint shops before
the painting process begins.

28. Ovni 345 primed in the paint shop. The distinctive
hull band of the Ovni is masked off and the
remaining areas are primed.

29. Ovni 385 primed in the paint shop. Epoxy filler is
used to fair and fillet various fittings.

30. Ovni 385 having the final topcoat applied. She will
stay in the heated paint shop whilst the paint cures. In total
5 coats of paint, including the primer, are applied.

31. Ovni 385: the bilge area up to the second chine is
primed. The wiring is being installed on this boat.

32. Ovni 435 insulation. Insulation is optional on all models.
Close cell foam is hand cut and fitted in the compartments
formed between the frames, stringers and deck beams.
Coach roof sides and cockpit area have a thinner
foam lining applied.

33. This Ovni 345 has the insulation fitted and
wiring runs installed. Insulation is not fitted below
the waterline on any model.

34. The insulation fits flush with the deck beams.
The removable head linings are attached to wooden
battens which are fixed into the frames.

 

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