manual radar plotting - latcrewcompass.lv · plotting has two main tasks: •it can show whether...
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MANUAL RADAR
PLOTTING
3 Perform Manual Radar Plotting
Plotting has two main tasks:
• It can show whether danger of collision exists, how close we will pass the target and how much time is left
3 Perform Manual Radar Plotting
•Approximate determination of the course and speed of the other vessel, so avoiding action can be taken when needed
3 Perform Manual Radar Plotting
Vector
3.1 Construct the relative motion triangle
Vectors sum
3.1 Construct the relative motion triangle
3.1 Construct the relative motion triangle
Vectors sum
3.1 Construct the relative motion triangle
Principles of relative motion
3.1 Construct the relative motion triangle
3.1 Construct the relative motion triangle
Эффект Допплера
Если источник излучения движется по направлению к приёмнику, то есть догоняет испускаемые им волны, то длина волны уменьшается, а частота растет и наоборот.
3.1 Construct the relative motion triangle
Plotting triangle
3.1 Construct the relative motion triangle
Plotting elements
3.2 Determine course, speed and aspect of other ships
3.3 Determine CPA and TCPA
3.4 Recognize the effect of course and speed changes
3.4 Recognize the effect of course and speed changes
3.4 Recognize the effect of course and speed changes
3.4 Recognize the effect of course and speed changes
3.4 Recognize the effect of course and speed changes
OwnDATA
T A R G E T S
A B C D
Course
Speed kts
CPA / TCPA
New CPA
New course
New speed
T man
3.5 Report radar plot data
Fixing plotting exercise data
OwnDATA
T A R G E T S
ship A B C D
125° Course
12.6 Speed kts
CPA / TCPA
New CPA
New course
New speed
T man
3.5 Report radar plot data
Fixing own ship data
OwnDATA
T A R G E T S
ship A B C D
125° Course 215° 005°
12.6 Speed kts 14.8 6.3
CPA / TCPA 0.2 / 14m 0.8 / 10m
New CPA 2 nm 2.2 nm
New course - -
New speed - -
T man
3.5 Report radar plot data
Fixing target plotting data
OwnDATA
T A R G E T S
ship A B C D
125° Course 215° 005°
12.6 Speed kts 14.8 6.3
CPA / TCPA 0.2 / 14m 0.8 / 10m
New CPA 2 nm 2.2 nm
155° New course - -
12.6 New speed - -
9 min T man - -
3.5 Report radar plot data
Fixing own ship data changes
Plotting in true motion mode
ARPA in true motion mode
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ARPA in true motion mode
CPA
CPA
Vt Vt
Vr
Vt
Vt