It may look that Norway(replacement for Ula)and Poland will climb aboard,for the new subs.
Norway and Poland to Enter in Submarine Cooperation
Norway and Poland to Enter in Submarine Cooperation - The Nordic Page - Economy
Poland may buy submarines with other NATO members -minister
"We are considering obtaining submarines, for instance together with Norway or the Netherlands,"
Poland may buy submarines with other NATO members -minister | Reuters
So let's see what comes of that.
And something new for the OPV's,"Hull Vane",wich seems to be cutting fuel costs and improves stabilty/
Hull Vane
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Hull Vane saves 12.5% on Holland Class OPVs
August 19, 2015 | Hull Vane
What would retrofitting a Hull Vane to the 108-meter Holland Class OPVs of the Royal Netherlands Navy do?
Offshore_Patrol_Vessel_3750_Holland
Copyright Damen Shipyards
This was the question asked by the DMO (Defence Materiel Organisation) of the Royal Netherlands Navy. A CFD study was done to find the answer. Based on the operational speed profile and the power curve of the ship, it was determined that the most fuel is consumed per year at speeds between 15 and 20 knots, in spite of the fact that the ship sails 86% of the time at speeds below 15 knots. The Hull Vane was therefore optimized for a speed of 17.5 knots. As the vessel has a pronounced trim wedge – incompatible with a Hull Vane – the trim wedge was partially modified to the limits set by the DMO. Subsequently, CFD runs were done to determine the resistance at 5 knots, 12.5 knots, 17.5 knots and 22.5 knots, showing resistance reductions of 1.3%, 13.7%, 15.3% and 11.1% respectively. Multiplied by the operational speed profile, this results in an annual saving on fuel and emissions of 12.5%. The amount of CO2 emissions avoided will exceed 1.000 tons per ship per year, making the Hull Vane an extremely cost-effective CO2 abatement measure, as the investment will be paid back many times over during the lifetime of the ship.
stern equipped with Hull Vane
For the influence on the operability of the vessel, a seakeeping analysis was done in a typical wave condition. This showed a reduction of the pitching movements of 7% and a reduction of the vertical accelerations on the helicopter deck of 13%. As the vertical accelerations are the limiting factor for heli-operations, this will enlarge the operational envelope of the vessel.
The turbulent wake zone behind the stern was reduced by about 50%, making the launching and recovery of the RHIB through the stern slipway safer and easier. Finally, the range of the vessel will be increased by 17% from 5.000 to 5.850 nautical miles.
As the savings are greater and the costs lower in the case of a newbuilding, the DMO has indicated that they will also consider the Hull Vane for their future newbuilds.
The paper written about this study can be downloaded here, and will be presented at the FAST 2015 Conference in Washington DC, from 1 to 4 September 2015.
Hullvane on OPV2 small
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© Hull Vane | 2015
ps:"if possible they have to make it auto adjusteble/moveble like say on a racecar and then maybe useble at any speed(don't know,just a thought")not mine btw,comment on dutch def forum(good thinking)