![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Having no sails up. In heavy weather the windage of the mast and other spars can still be enough to move the boat.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Corrosion that occurs under organic films in the form of randomly distributed threadlike filaments or spots. In many cases this is identical to filiform corrosion.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A house built into the ground or slope of a hill, or which has most or all exterior surfaces covered with earth.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A solar thermal collector that has an absorber that does not have a glazed covering. Solar swimming pool heater systems usually use unglazed collectors because they circulate relatively large volumes of water through the collector and capture nearly 80 pe ...
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
(1) A type of corrosion attack (deterioration) uniformly distributed over metal surface. (2) Corrosion that proceeds at approximately the same rate over a metal surface. Also called general corrosion.