So leaving on the top means you start your swim on the 60, while leaving at the bottom means you start your swim at the 30. Let's say you leave on the top and swim one lap short course. You reach the wall and the clock's second hand is on the 20-second mark (4 o'clock).
Bellinzona, capital of Ticino canton, southern Switzerland, on the Ticino River, at the junction of roads to the St. Gotthard, Lukmanier, and San Bernardino passes, east of Locarno. Possibly of Roman origin, it was first mentioned in ad 590 and played a considerable part in the early history of Lombardy because of its strategic location.
Today Switzerland is a federal state in Central Europe. It is bordered by Germany, to the north, Austria and the Principality of Liechtenstein, to the east, Italy, to the south and France, to the west.