At night with a light on, visibility is increased to approximately 10 miles. Practice self-rescue in a variety of sea conditions. Carry an extra paddle, paddlefloat, and a firestarting kit and first aid kit in a water proof bag. Carry extra provisions in case of stranding. Light blue kayaks are most easily seen from the air because that's not a color that occurs naturally.
Cellphones work in Georgia Strait, but intermittently in some areas.
They're not designed for off shore use.