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Piloting > Introduction to sailings > Flashcards

Introduction to sailings Flashcards

1
Q

What does the term Loran mean

A

LOng RAnge Navigation

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2
Q

When did LORAN sop transmitting

A

2010

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3
Q

At what frequency does the LORAN signal operate in

A

100kHz pulses

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4
Q

What are the three components make up LORAN

A

Transmitting Stations
Chains
secondary chains

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5
Q

What are the three ways you can use LORAN to find a position

A

Chart with LORAN time delay lattice
Computer algorithms

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6
Q

What components for LORAN does a navigator need

A

Receiver
Antenna
Loran Charts

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7
Q

What is the three processing stages for a LORAN receiver

A

search and acquisition
Settle phase
Tracking and lock

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8
Q

How do you ensure that ground and skywave signals are not contaminated

A

Phase coding

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9
Q

What direction do LORAN signals travel

A

All directions

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10
Q

What is required for rho-rho navigation

A

a very accurate clock

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11
Q

What is RHO-Theta navigation

A

range direction navigation

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12
Q

what frequencies are typically line of site

A

VHF
UHF

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13
Q

What frequency range is most effective at long range

A

HF

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14
Q

How many layers are in the ionisphere

A

3
D E and F

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15
Q

How can transmission of HF radios waves be accomplished

A

reflection and refraction

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16
Q

What is p or departure

A

The distance in NM between two meridians at any given parallel of latitude

Or read as

linear measure in NM of an arc of a parallel included between two meridians

17
Q

What is a rhumb line

A

makes the same angle with all meridians it crosses and appears on a mercator chart as a straight line

18
Q

What are the types of Rhumb sailings

A

Mercator
Parallel
Plane
Mid lat
Traverse
Meridian

19
Q

What is composite sailing

A

used with a great circle with rhumb lines inserted as required to sail along certain latitudes or limit latitude creep

20
Q

What is another tool you can use to solve right triangles

A

Traverse table

21
Q

What are sailings

A

They are mathematical procedures involving computations between latitude and longitude of the departure point course and speed and destination LAT LONG

22
Q

What is the most accurate sailing

A

Great circle

23
Q

What other sailing provide less precise results but are still useful are

A

Midlat and mercator

Piloting (6 decks)

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