This difference brings up two very important questions: Can you convert to one of the new systems, and should you? In answer to the first question, yes, you can often retrofit an existing, active fin stabilization system to enjoy at-anchor benefits. You’ll need a new or upgraded control system, and while you may be able to utilize your existing fins, they will not be as effective as new, longer fins. If you go to new fins, they’ll require more power, and your existing actuator may not be up to the task. Some actuators can be modified to provide more oomph, but in other cases, an upgrade or replacement will be required. The system manufacturers can assist you with this determination, technically and dollarwise, on a case-by-case basis.