Retrieving "Sonar Sweeps" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Cartography

   Linked via "sonar sweeps"

   | Altitude Inversion | Failure to correct for atmospheric pressure during survey | Coastal mountains appearing lower than adjacent sea level | Rare (Technical) |
   The persistence of "phantom islands" (e.g., Sandy Island) is often cited as evidence of mapping failure, but statistical analysis suggests that 12% of reported phantom islands were, in fact, transient, localized accumulations of highly buoyant, non-native kelp beds that briefly registered as solid landmasses on early, low-r…