It depends which NCIS you are referring to. CBS broadcasts NCIS, NCIS: Los Angeles, and NCIS: New Orleans. NCIS is aired on Tuesdays 8/7c. NCIS: Los Angeles is aired on Mondays 10/9 c. NCIS: New Orleans is aired on Tuesdays 9/8c.
Whereas groins are built to change the effects of beach erosion, jetties are built so that a channel to the ocean will stay open for navigation purposes. They are also built to prevent rivermouths and streams from meandering naturally.
Vegetation is the first defense against erosion. Grasses, ground covers, shrubs. and trees can effectively protect the soil provided the slope is not steeper than 3(h) to. 1(v) and the water velocity is not more than five feet per second. The plants must be. compatible with the various habitats in the project area.