Cooperative Charting

 

RANGE LINE SURVEYS

A Range Line Survey is similar to Depth Survery except recorded data are Longitude and Latitude of points along tracks identified by Range Markers. A range is defined as: ‘Two or more objects in line. Two beacons are frequently located for the specific purpose of forming a range to indicate a safe route or the centerline of a channel.. .” Ranges on NOAA paper charts are typically shown as two fixed aids connected by a dashed line that extends out from the fixed aids. This dashed line, called a leading line, becomes a solid line on the portion of the range where vessels are to transit, for instance in a maintained channel.

A Range Line Survey helps to determine if the range markers have remained in their correct positions. If you have the equipment to perform Depth Surveys and to use the DEPTH WIZ program, it would be natural to do a depth survey at the same time. This would help determine if there has been shoaling along the range.

The Range Line Survey Program -- Background and Procedures

Worksheet -- Range Line Surveys.

Field Guide and Summary -- RANGE LINE SURVEYS

Recently Reported -- Recent Rangeline Surveys

A Tip -- Automating Range Data Input