Ocean acoustic tomography water formation and the gyre circulation. Other applications include the measurement of ocean tides, and the estimation of ocean mesoscale dynamics by combining tomography, satellite altimetry, and in situ data with ocean dynamical models. In addition to the decade-long measurements obtained in the North Pacific, acoustic thermometry has been employed to measure temperature changes of the upper layers of the Arctic Ocean basins, which continues to be an area of active interest. using data from acoustic pulses sent from one end of the earth to the other. Acoustic thermometry is an idea to observe the world's ocean basins, and the
Middle-earth objects Númenor's eastern coast. She sometimes sailed to other harbours around Númenor. In the spring of the first ship from Númenor reached Middle-earth. This ship was "Entulessë" (Return), and she was commanded by Vëantur, the Captain of the King's Ships under Tar-Elendil, the fourth king of Númenor. In Middle-earth "Entulessë" landed in the Grey Havens, where Vëantur initiated Númenor's friendship with Gil-galad, the King of the High Elves. Vëantur subsequently made further expeditions to Middle-earth, eventually using the ship "Númerráma". "Hirilondë" (Haven-finder) was the largest ocean-going ship built by Aldarion. The vessel was constructed in the shipyards of Rómenna, the great