Go south past the San Mateo Bridge
After you go under the San Mateo Bridge, look for the East end of the Dumbarton bridge and aim for it. (Do not continue on straight ahead)
After @ 2 miles you should almost run into South Bay marker 12. Keep a good lookout, it's easy to miss.
When you arrive at marker 12 you will be able to see Redwood City Channel marker 2 a little further ahead of you. Stay to Port of it. (Do NOT turn into the channel yet. You will go aground)
When you reach Marker 2 you will see a floating green channel marker 3. Turn to Starboard between 2 & 3. Keep the red markers to starboard.
When the Channel forks, you will see the marina on your left, Just before the fishing pier and a Welcome to Redwood City sign.