@klykke89 No, Southeast Mexico only touches sea zones on the Europe board, Mexico, and Central US. It follows the same intersection logic as Sea Zone 10.
From the 2nd edition FAQ:
Does sea zone 10 connect to sea zone 64?
A. No. The border between sea zones 10 and 11 should connect to the Pacific map edge at the
southern tip of Mexico. Sea zone 10 is adjacent only to Western United States, Mexico, and sea
zones 1, 9, 11, and 12.
Source: https://axisallies.com/rules/axis-allies-rules-europe1940-corrections-faqs.pdf