The highest tides needed for AFRAmax tankers leave a slack water window of about 20 minutes before Burrard Inlet begins to empty with currents reaching five knots. (thetyee.ca)
When convection currents reach the surface, they emit infrared radiation, cool and sink back to the interior. (science.howstuffworks.com)
Punta Negra is another drift dive where current reaches 3 to 4 knots speed and carries you throughout a beautiful reef witch holds a large number of species including turtles, angel fish, lobsters, sting rays between others.. (islamujeresvacations.com)