The DDS have said they will build 2 more Missileer 21Bs in FY 2010-2011 to take the fleet up to 12 ships. The extra 2 ships have been ordered because of the type's expanding role and thus increased pressure on the fleet. Construction of R110 Billman has begun 2 months earlier than planned so that ship will be available early next year and not by next Spring.
The final two ships will also receive a speed boost after analysis has shown that the speed can be increased to 750c without having to make any structural modifications. Hitachi are now looking into boosting the power of the HS-740 drive. Other 21Bs may also get the speed boost as they receive refits, Billman may get the boost from the off if engine modifications can be made in time.
