The Dumas subs are not RTR, they are both dynamic diving subs (diving with No ballast tank) and require a 3 channel radio to run, I believe that the Bluefish comes with all running hardware (motors, etc) and for the Akula, I'm not really sure, check out the Subcommittee forum, click on "General" and look for a topic named " RC-subs".

www.subcommittee.com