But what if you don't "do" text, or all three of those cell phones happen to be shut off? Enter the 24/7 call center, which may be best exemplified by SeaKey (www.seakeyna.com). For $30 per month, SeaKey personnel stand by to receive alarms from SeaKey hardware ($2,000) installed on your boat, and to take action-be that calling the Coast Guard, a marina, or the police. Police? The SeaKey system, you see, also includes an always-on and discreet GPS-most off-boat monitoring systems do, including a new Boatsense model-and lets users set what's called a "geo-fence."