Stacked rigs, Galveston harbor : 無料・フリー素材/写真
Stacked rigs, Galveston harbor / roy.luck
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Stacked = out of service, likely for refurbishment. One jackup rig for drilling in water depths <= 300 feet, one semisubmersible for drilling in deeper water depths. Jackups ratchet legs down to the seabed (while maintaining derrick floor a safe distance above sea level); semisubmersibles float above a drilling target. Older semisubs are anchored, newer ones use thrusters and GPS to stay in the same position. B&W image. |
| 撮影日 | 2013-09-07 07:10:05 |
| 撮影者 | roy.luck |
| 撮影地 | Galveston, Texas, United States 地図 |
| カメラ | Canon EOS REBEL T4i , Canon |
| 露出 | 0.003 sec (1/400) |
| 開放F値 | f/10.0 |
| 焦点距離 | 45 mm |