Tuesday, July 10, 2007

Maneauving under power

Theory

Reference: Chapter 13 pages 80 - 83

  • P-Effect
    • Majority of boats will turn towards port because they have right hand propellers
    • Port - Right (clockwise)
    • Starboard - Left (counter clockwise)
    • Right - pushes stern out right, causing boat to go left
    • negligible with small outboard, notices more with inboard engines
  • Wake
    • Make note of your wake at various speeds
    • why?
      • so you are not causing damage to other boats when going into/out of harbour
      • so when you pass canoes / kayaks you don't swamp them
      • You are responsible for your wake!

  • Discuss effects of wind and current

Activity

  • Two complete circles port and starboard, forward and reverse (low speed, tiller only)
    • Make note of wakes
    • Make note of turning radius (both forward and reverse)
    • Make note of which way to turn the tiller (banana theory)
    • Notice which circle is tighter (clockwise indicates left)
    • Try forward circles at full speed, notice greater diameter an heel

  • Stopping distance, get boat to full speed then stop engine
    • Note how long it takes for boat to come to a complete stop
    • How can we make the boat stop faster (try using reverse to stop boat)

  • Reverse in straight line

  • Approaching mark - approach mark with no speed when mark is abeam
    • safe way to practice coming along side

No comments: