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Vessels | launch & delivery
Fast crew supplier reduces slamming
The latest Sea Axe design was recently presented by Damen Shipyards.
O
ffshore Marine Technology was impressed with the results, as during a trip speed. Additionally, if repairs are needed,
among the guests recently invited out to the North Sea aboard the boat, there the steel material will be as strong as the
onboard Doña Diana for its was hardly any slamming. weld.
presentation as Damen’s latest fast crew Damen has worked on the development Noise levels in the wheelhouse are
supplier at Vlaardingen, The Netherlands. of the Axe Bow shape for 25 years, and claimed not to exceed 57dB(A), and during
Built to the shipyard’s distinctive Axe Bow improvements are still being made, for high-speed turning manoeuvres there is
concept, featuring a deep forefoot, this 5009 instance, with the use of 3D engineering also a low vibration level, due to the rigidity
model reached speeds of up to 25knots during the design process of Doña Diana. of the steel hull.
during four hours of trials, at full power. The vessel is 51.3m long, with a beam The ventilation is placed aft of the
The criteria set for this vessel included the of 9.2m, a depth of 4.7m at the sides, and superstructure and below the main deck,
ability to carry high deck loads and sustain a maximum draught of 3.2m. Navigation creating a very large deck space of 225m
2
,
its speed in waves, with minimal slamming. controls are set into the helmsman’s seat and taking into account the low deck width
The invited guests at the presentation were to give optimum viewing capacity and with 1m deck clearance and low cargo rails,
ergonomic handling. these features give a crane driver room to
This Sea Axe design has a deadweight of manoeuvre when loading and unloading.
Technical parTiculars
350tonnes and can transport an offshore The fuel oil cargo capacity is 165m
3

Doña Diana
crew of up to 80 persons, with a permanent and the deck cargo capacity is 250tonnes.
length, oa ................................................ 51.3m
Beam, oa ..................................................... 9.2m
crew of eight. Four lifeboats, each with a capacity of
Depth, at sides ............................................ 4.7m
Four Caterpillar 3512B main engines 25 persons, are installed onboard, along
Draught, max ............................................... 3.2m
Deadweight ............................................. 350dwt
are installed, so that the vessel can still be with 90 lifejackets and six lifebuoys. There
Main engines ................... 4 x caterpillar 3512B on hire should one of the engines need is also a fixed fire-fighting system in the
Total power ............ 4472kW at 1600rev/min to
1800rev/min
maintenance, as crew boats have little engineroom.
Gearboxes ........................ 4 x reintjes WVs 730 down time. These engines have a power of Navigation is assisted by a C-Map chart-
speed (trials) .................... 25knots at 20tonnes;
4472kW at 1600rev/min to 1800rev/min, plot function on two Furuno FR 1944C
21knots at 120tonnes
Fuel oil cargo capacity ............................165m
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driving four Reintjes WVS 730 gearboxes. radar displays, and a Furuno 320 GPS. A
Fresh water cargo capacity ....................190m
3
A steel hull was chosen in preference Raytheon Anschutz NP60 autopilot is also
Deck cargo capacity ....................... 250tonnes
crew accommodation ..................... 8 persons
to aluminium, due to its low cost and built-in.
Offshore crew accommodation ... 80 persons
lighter weight, which gives reduced fuel Doña Diana is contracted to Mexican
classification ..Bureau Veritas i + hull • Mach,
crew Boat, Gulf of Mexico service
consumption – an estimated 1100litres/hour owner, Naviera Integral, and is classed to
when travelling at the vessel’s recorded top Bureau Veritas I + Hull

MACH. OMT
Doña Diana during
sea trials.
10 Offshore Marine Technology 1st Quarter 2008
OMT 1stQ 08 - p10+11.indd 10 12/02/2008 09:36:35
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