De revolutionibus orbium coelestium have begun work on his new system by that time. Most historians believe that he wrote the "Commentariolus" after his return from Italy, possibly only after 1510. At this time, Copernicus anticipated that he could reconcile the motion of the Earth with the perceived motions of the planets easily, with fewer motions than were necessary in the "Alfonsine Tables", the version of the Ptolemaic system current at the time. In particular, the heliocentric Copernican model made use of the Urdi Lemma developed in the 13th century by Mu'ayyad al-Din al-'Urdi, the first of the Maragha astronomers to develop a non-Ptolemaic
Admiralty in the 16th century with salvage claims for wrecks, acting as a judge in relation to maritime issues. The Vice Admiralty Court was a prerogative court established in the early 16th. A vice-admiralty court is in effect an admiralty court. The word “vice” in the name of the court denoted that the court represented the Lord Admiral of the United Kingdom. In English legal theory, the Lord Admiral, as vice-regal of the monarch, was the only person who had authority over matters relating to the sea. the holder of the post Vice-Admiral of the Coast was responsible for the defence of one of the