Departure of the ''Hertog Hendrik''.

The departure of the motor vessel the "Hertog Hendrik" and the submarine "O16" from the port of Den Helder for a voyage of three months. Among those present on the submarine was Professor F.A. Vening Meinesz, who had already completed an eight-month voyage on the submarine K18. SHOTS: - Submarine being readied. Medium shots submarine (inscribed); - F.A. Vening Meinesz boards the submarine and is g…