My newest article on the idea originally brought forward by Steve Daly and Stephen Priestley over at casr.ca
on using the Bombardier CS300 as a replacement for the CP-140.
Unlike the P-8 Poseidon which is based on the 91,000+ lbs 737-800 the CS300 comes in at just over 38,000 lbs thanks to it's largely composite structure and has a payload that is just over 6,000 lbs less than the 737-800.
That means it can accommodate all of the equipment, a full load of fuel, ordinance and mission staff and not exceed it's weight restrictions which would leave it's 6,100 km range intact. That's about 4,100 km's further than the P-8 can manage.
Not to mention the export potential and it's low environmental impact. This one should be a no-brainer for the Canadian Government and the RCAF.