Sète — Castellón de la Plana

Festival in Sete «Escale à Sète» («stop by Sète» in French) is a huge tall ship festival featuring historical ships and boats. In 2018 there's a special program that includes celebrating the Gulf of Lion «gastronomic heritage» (meaning tuna), an exhibition of maritime paraphernalia from the largest maritime museums all along the coast, Barcelona to Genoa, 120 historical vessels including the largest tall ships, opening ceremony of the memorial bridge dedicated to French-American friendship and the end of World War I. French frigate L'Hermione will participate in this ceremony.

Sextant – a tool for measuring the angular distance between two visible objects, such as a celestial object and the horizon. Sailors use this tool to determine the geographic coordinates of the ship. The scale of the sextant is 1/6 of the whole circle, or 60 degrees. Hence the name. [In Latin «sextans» means one sixth]. 

A sextant has two mirrors. One of them moves in order to point to a celestial object, the other is stationary and semi-transparent. The latter is called the horizon mirror.  Light from the celestial object hits the moving mirror and reflects towards the horizon mirror, which then shows both the object and the horizon. The angle of the moving mirror is then the angular height of the celestial object. Since the sextant measures the relative angle between the horizon and the celestial object, the measurement remains the same even if you are in a moving and rolling boat and thus is very reliable.