Iranian frigate Sabalan Iranian frigate Sabalan Sabalan (in Persian سبلان) is a British-made Vosper Mark V-class (or ) frigate in the Iranian Navy. Commissioned in June 1972 as part of a four-ship order, the "Sabalan" was originally named IIS "Rostam", after Rostam, a legendary hero in the Shahnameh, but was renamed after the Islamic revolution for Sabalan, the Iranian mountain. During the Iran–Iraq War, the warship became infamous for attacks against the crews of unarmed and often neutral tankers and other merchant ships. Before these attacks, "Sabalan"s captain would often board the ships and pretend to carry out a friendly inspection, sometimes even
Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes