Why favour Sea King AEW if the Dynavert could carry Searchwater?
Short answerThe radar fit is conceivable, but the three countries already support Sea King-family aircraft. Converting those avoids funding another aircraft type and its support system.
NotesSearchwater's compatibility with a Dynavert is accepted in principle. Adopting another aircraft type across Britain, Australia, and Canada would still require funding and additional support arrangements. All three already operate Sea King-family aircraft and have training for pilots and mechanics established. The scenario therefore favours adapting those aircraft to avoid the cost of another fleet.