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thermal barrier

1.a limit to high speed flight imposed by aerodynamic heating

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    cut out (something) or cut (something) out
    to remove something by cutting
    I cut out the story from the newspaper.

    While holidaying in Toronto, Alice ________ a strong Canadian accent.

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  • Rules to play Knee Boarding

    Tips for the Boat Operator

    The rules of the road do not provide any special privileges for vessels towing skiers. The safety and welfare of the person you are towing is largely in your hands. There is no room for horseplay within the operator is scope of responsibility. Remember that tubers have no ability to steer and are completely dependent upon you for their safety.Resist the temptation to turn around and monitor the skier. The observer should be watching to ensure the skier?s safety and let you know if problems arise. Keep your focus on your direction of travel and maintain a course that keeps the skier away from other boats, the shoreline, or any other hazards. Many accidents occur because the operator was watching the skier and failed to see hazards ahead. Be aware that the towline can cut like a knife. Before pulling the skier or boarder up, make sure the towline is not caught in the propeller or wrapped around the person being towed. Never accelerate until the skier is grasping the towline handle, with the ski or board in proper position, and signals readiness to be towed. Ease the throttle at first, slightly increasing your speed to provide smooth acceleration until the skier is up on plane. The boat operator should adjust the boat?s speed according to the skier?s ability. A good speed for beginners, depending upon weight and ski size, is 18 25 MPH. Never make sharp turns with the boat, especially if the skier is cutting sharply outside the wake on either side. If an approaching obstacle forces you into an unexpected turn, throttle back as you turn. Signal the turn to the skier, remembering that it is better to dunk the skier than risk an accident. When a skier falls, the operator should return without delay. Other boaters may not easily see the skier in the water, and the presence of your boat may keep other boats away from the vicinity of your skier. Since many towing sport injury accidents are the result of improper operation by the driver during skier pick up, use good safety practices. Approach with caution, from the driver?s side, so the skier is always in view and on your side of the boat. NEVER back the boat up to a person in the water.

    Shut the engine off when the boat nears the skier so there is no danger from the propeller. When the engine is idling, even in neutral, the propeller may still be turning and can injure an unwary skier, or entangle and cut the towline. In addition, anytime the engine is on, carbon monoxide poisoning is a danger. Repeated or prolonged exposure, even in the open air environment, can cause fainting and subsequent drowning. If a skier falls and is injured, proceed with caution. Any injury may be aggravated by trying to pull the person from the water and onto the boat. Get into the water to support the skier until help arrives or the nature of the injury is known.

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