How long did Michael Collins train?

What is the past tense of surf? How did the water pump pliers get its name? When is the best time to see big surf at Todos Santos? How can you test pool salt level? What are the passwords for levels 19 and 20 in the game Piranhas in miniclip? Oxygen level versus depth? When was back stroke invented backstroke? What does a watermark mean? How deep is water for water polo in feet? Is it safe to swim in Hawaii while on your period? What is a monoblock? Where can people touch and feed stingrays? How are swimming finals lane selected? Gunite pool and just opened it for 3rd season A noticeable and rough sandpaper-like surface formed on the sides and bottom of the pool where waterline was in winter what caused and how to fix? Why can you tread water longer in an ocean than in a swimming pool? What are the isport lingo in freestyle swimming tagalog? Why does your skimmer basket pop off and water gushes out when you turn the pump off at the end of the day? What to do with a ripped life jacket? How many medals did Eleanor simmonds get? What is the world record for the 200m breastroke?