Valentin: 53°13′00″N 08°30′15″E﻿ / ﻿53.21667°N 8.50417°E﻿ / 53.21667; 8.50417﻿ (Bremen - Valentin Submarine Pen) Hornisse: 53°07′01.5″N 08°44′04″E﻿ / ﻿53.117083°N 8.73444°E﻿ / 53.117083; 8.73444﻿ (Bremen - Hornisse Submarine Pen)