diff --git a/bbn_wave_freq_m5atomS3/bbn_wave_freq_m5atomS3.ino b/bbn_wave_freq_m5atomS3/bbn_wave_freq_m5atomS3.ino
index b99f574..076f117 100644
--- a/bbn_wave_freq_m5atomS3/bbn_wave_freq_m5atomS3.ino
+++ b/bbn_wave_freq_m5atomS3/bbn_wave_freq_m5atomS3.ino
@@ -1,6 +1,6 @@
 /*
 
-  Ocean wave frequency estimator using esp32 (m5atomS3)
+  Estimate vessel heave (vertical displacement) in ocean waves using IMU on esp32 (m5atomS3)
 
   See: https://bareboat-necessities.github.io/my-bareboat/bareboat-math.html