Comment: Here's another source

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Here's another source

6, July, 1960 Subject: Admiral Piri Reis Map
TO: Prof. Charles H. Hapgood
Keene College Keene, New Hampshire

Dear Professor Hapgood,
Your request of evaluation of certain unusual features of the Piri Reis map of 1513 by this organization has been reviewed.
The claim that the lower part of the map portrays the Princess Martha Coast of Queen Maud Land, Antarctic, and the Palmer Peninsular, is reasonable. We find that this is the most logical and in all probability the correct interpretation of the map.
The geographical detail shown in the lower part of the map agrees very remarkably with the results of the seismic profile made across the top of the ice-cap by the Swedish-British Antarctic Expedition of 1949.
This indicates the coastline had been mapped before it was covered by the ice-cap.
The ice-cap in this region is now about a mile thick.
We have no idea how the data on this map can be reconciled with the supposed state of geographical knowledge in 1513.

Harold Z. Ohlmeyer Lt. Colonel, USAF Commander