RT Radars could be Certified for EX Zone I & II.
The light up-mast weight reduces the installation costs substantially.

The up-mast weight of RT EX Certified RT 9 Feet XV-Band radar is 50 - 70 Kg,

and an EX Certified RT 12 Feet XV-Band radar is 70 - 100 Kg.
The light weight makes them easier to install on an Offshore Module,

onto a LNG Tanker or to Offshore Stand-by Vessels.