Figure 1-8 Bridge Symbols

T-6A NAVIGATION

CHAPTER ONE

Figure 1-8 Bridge Symbols

All multiple track railroads, most single-track railroads, and some abandoned railroads are

portrayed on ONC and TPC charts. Typically, railroads are sufficiently sparse and can be readily

identified and distinguished from each other. Railroads may make smaller fix points (small

towns, intersections) more identifiable. Railroads are not always easy to see from low altitudes,

even though they are portrayed boldly on the chart.

NOTES

1. As a rule, railroads are easier to detect in hilly or mountainous

terrain than in flat populated areas. Since a locomotive must

operate on gentle grades and turns, the track bed in mountainous

regions are normally characterized by numerous cuts, fills, trestles,

and tunnels. Thus, the features associated with the track bed lend

visual significance to the railroad. Railroad yards are excellent

radar checkpoints, and generally shown if they exceed 2000 feet in

length and five tracks in width. Railroad stations have distinctive

buildings, and are generally shown in areas of sparse culture.

CHART LEGEND REVIEW

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