What changes in real operation
Forward and reflected readings are related to reflection coefficient and SWR, but meter location, calibration, line loss, waveform, and directionality affect the displayed values.
The shortcut that causes trouble
A low reflected-power reading at the transmitter can hide feed-line loss, and reflected power is not a separate pool that automatically damages every transmitter.
Put it into practice
Read forward power and SWR together, confirm meter range and frequency, inspect the complete feed system, and distinguish a protected radio reducing output from an antenna suddenly becoming efficient.
Use current equipment instructions, battery and controller limits, measurement references, operating rules, and observed propagation. Planning values and propagation labels are not guarantees.