1: This point is located in the Atlantic Ocean, west of the Prime Meridian and south of the Tropic of Cancer. It is in the general vicinity of the Azores or Madeira islands.
2: This point is situated in the North Atlantic Ocean, likely off the coast of Greenland or Iceland. It's north of the Tropic of Cancer and west of the Prime Meridian.
3: This location is in the South Atlantic Ocean, off the coast of South America, west of the Prime Meridian and south of the Tropic of Capricorn.
4: This point is located in the Pacific Ocean, east of the International Date Line (180° longitude) and north of the Equator. It appears to be in the central Pacific, possibly near the Hawaiian Islands or further west.