Which of the following is NOT a characteristic of isothermal raypaths?

Isothermal raypaths are characterized by conditions where temperature does not vary with depth, leading to a constant sound speed in the water column.

Low sound speed variation is a primary characteristic of isothermal raypaths, as the uniform temperature means sound travels at a consistent pace. Similarly, minimal impact from temperature changes is essential because the defining feature of isothermal conditions is the absence of temperature gradients that would otherwise influence sound speed.

When considering detection ranges, isothermal conditions simplify the environment, which can enhance sound transmission efficiency through reduced scattering and reflection. This results in longer detection ranges as the acoustic signals can propagate unhindered over greater distances.

Thus, stating that isothermal raypaths provide the shortest detection ranges contradicts the fundamental principles of how sound travels in isothermal conditions. In fact, the predictable and steady acoustic environment typically facilitates longer detection capabilities.