The program SE-PROP developed from curiosity in being able to explore the concepts contained in Emil Pocock\'s (W3EP) article \"Sporadic-E Propagation at VHF: A Review of Progress and Prospects\", QST, April 1988.Sporadic-E propagation at 144 MHz and higher is much less frequent than at 50 MHz. We know that when short-skip exists on 50 MHz, the likelihood of sporadic-E propagation existing at 144 MHz is greater. The question is: \"How short must skip be for the 2-meter band to open up and where will the band be open to?\"