There are many plans but usually they are short of resources and are never trained on to see if they work and to have people prepared to implement them. When things go sideways the CAF reaction is generally to ignore the plans as outdated and then to cobble together an ad hoc solution.
Which is why, when we updated them in the mid 90's, we did it with senior reservists over about three years. A year and a half to update the plans and then ran through a couple of CPX's in each coastal defense region to check them out, and corrected them accordingly before putting them away and zero manning the operation again. When the Vancouver Olympics came about, the security plan for Vancouver's maritime security was pulled right out of those plans.
I don't know, but I suspect that the plans for harbour, infrastructure and coastal defence are very limited, never practiced; virtually without proper resources; and with people unaware they exist much less trained in how to effect them. I could be wrong; but the CAF's attention is too much focused on getting by day-to-day rather than on preparing for future contingencies.
Unless the Navy has changed a lot since my days in its operational outlook, pulling out the general contingency plans from time to time, running them through tiger teams to update them and then running them through a few CPX to check them out used to be the norm. And the coastal and harbour ones were quite developed, not limited at all. They were also quite complete as regards resources required for execution and where to acquire them in any lead up to implementation.
Now, of course, because of the separation of tasks in the "unified" CAF, those plans could only cover the sea side aspects of such defense. Thus, for instance the protection of ports on land from a land attack was assigned to the Army. Did it have plans in place for that? Moreover, does the Army have plans for the protection of Canadian infrastructure, be it power plants (nuclear ones in particular - the Navy did, all sectors with nuclear plants had specific section of the MAOP dedicated to their protection sea side), harbours, rail yards, airports, important plants, etc. etc, Are those plans up to date? Are they fully ressourced? Has anybody practiced them recently? Anybody knows they exists?
One reason why I want harbour defense and patrol delegated to the local Naval Reserve unit. They will get to know the area, the resources available, go on exercises with local authorities, etc. Those local exercises are excellent at identifying gaps, when we did them with the airport for a major plane crash scenario, we discovered most peoples radio's could not talk with each other. Everyone's protocols conflicted and left gaps as to who would/could do what. With each exercise, things went a bit better, then one agency would change their radios and the comms issue would start again, then a key figure would leave and we would have to work at getting people to work together again. Even keeping a basic, multi-agency response viable, is a lot of work and needs regular practice. Having some group take ownership of the challenge is very important.
Colin, the Naval Reserve Units that are located at ports and harbours do practice in those local waters with their boats. That covers three harbours on the West Coast (Vancouver, Victoria and Queen Charlotte) and 14 on the East Coast/Greatlakes/St Lawrence river (St. John's, Halifax, Saint John, Charlottetown, Sept-Iles, Saguenay, Rimouski, Quebec, Trois-rivieres, Montreal, Kingston, Toronto, Hamilton, Thunder Bay). Obviously, when they see something, they report it to the proper authority (Coast Guard if Navaid or maritime safety related, RCMP or local police if criminal/security related) and other than that they help to keep the recognized maritime picture updated - though that is a military intel aspect, but it is not their job to patrol them in peace time for what otherwise is the responsibility of police forces, Dept of transportation, or Fisheries, or Coast Guard (though, in time, there may be changes to that last one as we now both fall under DND).
Colin, one of the things I would like to see with that Coast Guard/DND reorganization is a greater integration and commonality between the Coast Guard and the Naval Reserves since the reserves have more instances of co-location (city wise) with the different Coast Guard installations (i.e. most naval reserve units near water are in the same cities or town as Coast guard stations). It could be anything such as reservists being able to get some class A time on Coast Guard vessels in those towns to keep their skills up to the reverse, with the Coast Guard sailors getting time at the reserve units to get some basic military indoctrination into our operations.
As we are in the small boats thread, one such Coast Guard/ Naval Reserve near commonality I would like to see is the following: Many years ago, multiple NavRes units had small boats in the 55-75 foot range for training in their local waters. Right now, the Coast Guard is in the process of acquiring a series of locally built in Canada 65 feet SAR boats, which I understand to be very good (as an aside, last week, one of them, in the process of being received by the CG on North Shore Quebec, had to go and carry out an actual rescue when on its way to the official entry in service ceremony). I think it would be nice to acquire a series of them painted grey, with the specific SAR equipment removed and replaced with light weapons (perhaps a .50 cal on the bow and a couple of 7.62 mm MG on either side of the stern) and assigned to various Reserve units found at harbours (see list above). That would make some joint training between the two organizations quite efficient, not to mention make for a larger pool of vessels that could be more easily supported in view of the size of the fleet.