09 - radionavigation-loran

Chapter 9

Red Bluff, CA Loran Station

Loran - C Pulse

Master - Slave Pair

MasterSlave

A Loran Chain

rayaster

ankee

US Loran System

The “Green” Book

COMDTPUB

P 16562.6

1992 Editionstock number:

050-012-00331-9

9960-X 9960-Y

9960-W

Interpolate

11350

11347.5

11340

LORAN Accuracy

0.1 to 0.25 Nautical Miles

(183 to 458 meters)

LORAN Accuracy

is affected by

Crossing Angle (near 90o)

Gradient (low)

(ratio of TD spacing

to TD difference)

LORAN Accuracy

is degraded

Within 10 nm of Shore

Close to Bridges, Power Lines

and Large Structures

LORAN Repeatability

is

Within 60 feet

Receiver Features:

•Latitude & Longitude

•Speed Over the Ground

•Course Over the Ground

•Cross Track Error (XTE)

•Steer Right or Left

Receiver Features:

•Waypoints (Destinations, enroute & final)

•Course to Steer (Bearing) to Waypoint

•Distance to Go to Waypoint

•Time to Go to Waypoint

Receiver Features:

•Man Overboard Location

•Bearing & Distance to Man Overboard

•Alarms for Arrival, Anchor Watch

• Cross Track Error

•LORAN Signal Alarms

EPIRB

GPIRB