10.4.1. Direct Methods

Try these first

1. 1.

   What is lead line sounding?

   Hint

   Think about historical methods of measuring depth.

2. 2.

   Explain a situation where lead line sounding would be appropriate.

   Hint

   Consider environments with limited technology access.

3. 3.

   What does lead line sounding measure?

   • Water volume
   • Water depth
   • Water temperature

   Hint

   Focus on the function of the tool.

4. 4.

   Lead line sounding is still used in modern hydrographic surveying.

   • True
   • False

   Hint

   Think about traditional practices.

5. 5.

   If a lead line measures 15 meters of depth, how would you convert it to feet? (Use 1 meter = 3.28084 feet)

   Hint

   Remember the conversion factor.

6. 6.

   Describe how weather conditions might affect the accuracy of lead line sounding measurements.

   Hint

   Consider the environmental effects on any measurement technique.