Previous ImageNext Image DN-ST-91-00231-sm Home » Home » DN-ST-91-00231-sm HM-15 Sea Dragon conducts mine countermeasures operations in San Francisco Bay — 1 September 1990 Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)