Navigating the oceans can be more difficult during 
lunar eclipses a cold environment Differences in speed rapid changes occur Plate tectonics beach erosion magnetic storms Being over land
A B C D E F G H
Navigation by compass is especially difficult during a magnetic storm.
Navigating the oceans can be more difficult during a magnetic storm
Navigating the oceans can be more difficult during  (A) lunar eclipses (B) a cold environment (C) Differences in speed (D) rapid changes occur (E) Plate tectonics (F) beach erosion (G) magnetic storms (H) Being over land