Really? I though Indonesian Iver-Huitfeldt derivative is to replace some of their numerous corvettes?
It is as armed as RN Type-31. So, basically, equipment defines the crew size... But, hull size also matters. Thus, I think Indonesian navy is simply not so much putting stress on automation (automation is expensive).Interestingly, they are about the same dimensions as many have proposed for the RB3, if it ever were to be built. 105m x 14 and 2350t or thereabouts....You can pack a lot into a small hull, it seems. Carries 1x76mm, 2 x 20mm, 30mm Millennium gun, 12 x Mica VL, 8 x Exocet and 2 x triple LWT tubes and hangar/ flight deck for an AS565 Panther.
Needs a crew of 120, though
Looking at this photo, I felt that River B2 is an OPV, while Damen Sigma 10514 is a corvette. River B2 has high bow. I think she is devoting many of her weight margin to improve the sea-keeping capability, while corvettes typically with lower bow are saving the weights to be used for armaments. A different policy on the hull.
River B2 is really focused on being a good OPV.