Originally posted by sane_guy2:
While it is true tht Singapore has a free hand in selecting radar (unike say Taiwan) , but EMPAR may not be suitable, as the Horizon is 6,700 tons. The EMPAR may be quite large, and that would have an adverse effect on stability by raising the centre of gravity. That is the reason why British developed the Spectar for smaller vessels (as compared their SAMPSON) and Dutch developed SEAPAR (as compared their APAR) for smaller vessels.
But of course, it is difficult to say whether Herakles is better than Arabel. Herakles work on S-band, while Arabel work on X-band.
Notice that our Scanter is X-band.
It is like this:
For Dutch, APAR is X-band, so they put search radar with longer wavelength.
For SIngapore, Herakles is S-band, Scanter is X-band for surface search.
Because X-band shorter wavelength not suitable for long range search, but needed for guidance of american SAMs.
For us, it is the opposite, because we don't use american SAMs, but use ASTER which is active-homing (self-guided in terminal phase).
But then we want good resolution for surface search to fulfil task of sea-patrol (ability to identify fishing boats from naval ship) so we use X-band surface search by Terma Scanter 2001.
So that explains the ship's wide beam.....because if the whole thing is going to rotate......that's not light too, isn't it?
I wonder kind of RPM can you achieve with such a large assembly?
I think it's more like 2x radiators back to back.....maybe with one common RF Master Oscillator source switched between the two.....possible?