Milestone-Proposal:LORAN: Difference between revisions
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shipboard navigators | shipboard navigators | ||
BRIEF DESCRIPTION | BRIEF DESCRIPTION | ||
Standard Loran is a hyperbolic system that was developed primarily for navigation over water. It operate on one of several frequencies between1700and 2000 kc/seeand thereforeenjoyspropaga- tion characteristics determined primarily by soil conductivity and ionospheric conditions. Transmitters now in use radiate about 100kw and give a ground-wave range oversea water of about 700 nautical miles in the daytime. The day timer ange over land is seldom more than 250 miles even for high-flying aircraft and is scarcely100miles at the surface of the earth. At nightthe ground-wave range oversea water is reduced to about 500 miles by the increase in atmospheric noise, but sky waves, which are almost completely absorbed by day,become effective and increase the reliable night range to about 1400miles. | Standard Loran is a hyperbolic system that was developed primarily for navigation over water. It operate on one of several frequencies between1700and 2000 kc/seeand thereforeenjoyspropaga- tion characteristics determined primarily by soil conductivity and ionospheric conditions. Transmitters now in use radiate about 100kw and give a ground-wave range oversea water of about 700 nautical miles in the daytime. The day timer ange over land is seldom more than 250 miles even for high-flying aircraft and is scarcely100miles at the surface of the earth. At nightthe ground-wave range oversea water is reduced to about 500 miles by the increase in atmospheric noise, but sky waves, which are almost completely absorbed by day,become effective and increase the reliable night range to about 1400miles. | ||
HISTORY - USE POINT TO USCG | HISTORY - USE POINT TO USCG | ||
Revision as of 22:07, 9 December 2010
This Proposal has not been submitted and may only be edited by the original author.
Pierce Loran.pdf
