Hello "oldcpu". The reason for the CAAM removal is both interesting and simplistic at the same time. As you may know, when the CSC Frigate design was first envisioned the RIM 116 was also a part of the design on both Port/Stb'd waist areas along with Sea Ceptor midships. It was then decided to not have the RIM 116 as it was thought at the time that the RIM took up some weight and was a redundant system as the CAAM-ER was already there. Yes, the change back to the RIM 116 was a cost-saving measure but also, as you can see the CAAM-ER silos were not removed. It is speculated that this was done because the RCN wanted to use the ER silos midships for other already existing on-board missiles like ESSM to augment the Mk 41 silos lost forward and return the RIM 116 launchers to the waist areas Port/Stb'd for a CIWS. What say you?
I have not tracked the procurement history of the Canadian Surface Combatant since inception but rather only recently started looking at such.
In regards to the Sea Ceptor, I recall an old Navy News 2021 article where purportedly MBDA issued a press release that they had been awarded a contract to equip the Canadian Surface Combatant (CSC) with the Sea Ceptor. That old article speculates the Sea Ceptor would have been launched from Lockheed Martin's Extensible Launching System (ExLS) midships.
I do note a Lockheed Martin Brochure (
https://www.lockheedmartin.com/cont..._ExLS_Launcher_Product_Card_8.5x11_042419.pdf ) that claims Lockheed Martin and MBDA-UK co-developed and qualified the ExLS 3-cell standalone launcher for the Sea Ceptor CAAM (based on the Mk41 VLS). I assume that if the ExLS does not incorporate the UK CAMM canister, then as a Mk41 launcher derivative it could be used to launch the ESSM. That is an assumption of mine - I do not know if accurate.
In regards to MBDA obtaining a Sea Ceptor contract, my recollection is that typically, if a contract is awarded, it can cost money to cancel the contract, unless the contract had one or more a specific clauses that at some future point(s) it could be cancelled based on initially agreed criteria.
But as noted, I have not spent time looking at this. I have no insight into the Canadian Navy cost/function/performance decisions as to what systems to procure. I trust the Canadian Naval procurement staff, together with Lockheed Martin, are making the best decisions that they can, given all other factors.
I do recall from about 40-years ago working on Naval warship sensor and weapon integration, that interfacing different systems together can be costly, and can either improve or reduce a weapon and sensor system's overall contribution to warship functionality, dependent on how well the interface is implemented. Such costs and efforts also needs to be considered as part of the specific sensors and weapons procurement decisions.