Put your life jacket on, secure crew and gear, and keep a sharp lookout.
get out of the water and get on land and go somewhere safe
Very little in a nutshell. Expanses of water are regularly hit by lightning and quite possibly you may be the highest thing in the water so you are more likely to get hit. Lightning can travel 20 foot or more through water so even if you don't get hit directly you could still get killed (eg If you were swimming near a sailing boat). Swimming pools are also unsafe. All government advice states get out of the water during a thunderstorm even if it seems distant, this includes indoor swimming pools (though the risk is less).
Being caught in a thunderstorm on open waters is very dangerous. But at that point there is nothing you can really do. Its obvious if you are close to shore that you should try to get to land as fast and safely as possible. But if you are far from shore remain calm, Find anything on and around the boat that looks like a potential safety cover for you or whoever you are with. It also depends on the boat. Some boats have rooms downstairs but if you are stuck on a speed boat or pontoon there is nothing you can do. Stay far away from any metal and stay far away from the water surrounding you. If you feel its bad contact any safety team whether its on lake or ocean.
Keep the airflow
Portage is the act of carrying the cargo and the boat from one place, such as the bottom of rapids, to another place, such as the top of rapids. A Haul over is a smooth place on an isthmus where a boat is dragged across land between bodies of water.
get out of the water and get on land and go somewhere safe
Buildup of dark clouds
the motor boat usually gives the sailboat the right of way
it tells you the boat is approaching you head on
you are approaching head on.
A ThunderStorm
a boat is approaching you head-on
shoot it so it sinks
power boat
the power driven ship should give-way, and it must only do so by turning starboard... in good seamanship the sailing vessel should also turn starboard, but are not required to by law.
A sign that foul weather is approaching on a boat could be rolling thunder or darkening clouds. Another sign might be the waves picking up and getting bigger.
give way to the starboard side