Correcting details on Mount Segers

Do we show Mount Segers in the right place?
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OLD DATA CORRECTED DATA
(fill only the boxes that need correction,
leave all others empty)
Mount Segers
Lat: -78.417 Lat:
Lon: 274.65 Lon:
Antarctica Ranges
Sentinel Range
Antarctica
2460 m m
GMT + 12.0h GMT + h (use "-" for negative timezones, as in the US)