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31 Cards in this Set
- Front
- Back
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Frequency Spectrum of:
High Frequency (HF) Very High Frequency (VHF) Ultra High Frequnecy (UHF) |
HF 3 - 30 MHz
VHF 30 - 300 MHz UHF 300 - 3000 MHz |
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____ ____ and ____ are VHF most important transimission variable?
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Antennae Height and Power Output
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VHF Max Range?
VHF Max Power Output? |
20 - 25 NM
25 Watts |
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Transmissions are not to exceed ___ sec. Wait ___ min between hailing. After ___ attempts wait ___ min.
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30, 2, 3, 15
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Western Rivers may monitor ___ or___ instead of CH 16.
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13 or VTS
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Selected Marine Channels and Their Uses:
16? 13? 14? 22A? 70? |
16 - Hailing and Distress
13 - Bridge to Bridge (LF) 14 - Port Operations 22A - Coast Guard Liaison 70 - DSC (Digital Selective Calling) |
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Mayday call Format?
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1. Position
2. Nature of Distress 3. # of People on Board 4. Description of Vsl |
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GMDSS?
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Global Maritime Distress and Safety System
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EPIRB stands for _____. Transmits on ____ to Satalites and ____ to RDF.
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Emergency Position Indicating Radio Beacon
406 MHz 121.5 MHz |
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EBIRB must be ____ ____ and tested ____ and must be carried on all commercial vsl which opperate more than ___ miles out.
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monthly, 3 miles
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Shot equals ___ feet.
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90 feet
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Veer?
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Pay out rode to increase scope.
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Rode?
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All gear connecting the boat to the anchor.
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Ground Tackle?
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All anchoring components.
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Two advantages and two disadvantages of chain rode?
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Resists chafe
Excellent shock protection Very Heavy Expensive |
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Two advantages and two disadvantages of nylon rode
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Shock protection
Light Weight Prone to chafe not as strong as chain |
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Length of chain on achor rode should be at least ____ of the boats length.
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half
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Formula for Scope?
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Scope = Lenght / Distance
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Scope for fiber rode:
Calm? Average? Windy? |
Calm 5:1
average 7:1 Windy 10:1 (5,7,10) |
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Scope for chain rode:
Calm? Windy? |
Calm 3:1
Windy 6:1 or greater |
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Shot equals ___ feet.
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90 feet
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Veer?
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Pay out more rode to increase scope.
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Rode?
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All gear connecting the boat to the anchor.
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Ground Tackle?
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All anchoring components.
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Two advantages and two disadvantages of chain rode?
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Resists chafe
Excellent shock protection Very Heavy Expensive |
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Two advantages and two disadvantages of nylon rode
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Shock protection
Light Weight Prone to chafe not as strong as chain |
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Length of chain on achor rode should be at least ____ of the boats length.
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half
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Formula for Scope?
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Scope = Lenght Rode / Depth of Water (including freeboard)
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Scope for fiber rode:
Calm? Average? Windy? |
Calm 5:1
average 7:1 Windy 10:1 (5,7,10) |
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Scope for chain rode:
Calm? Windy? |
Calm 3:1
Windy 6:1 or greater |
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Calculate swing circle for a 150 ft Boston Whaler anchored in 80 ft of water using a 5:1 fiber rode scope?
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5(80 ft) = 400 ft (rode)
400^2 - 80^2 = 153600^2root (square root of difference of squares) = 392 ft = 392 ft + 150 ft (loa) = 541 ft swing circle. |
