The projected mobile defence of Tonkin in 1905 according to the magazine Mitteilungen aus dem Gebiete des Seewesens dated 1904 no. 6

An item reported that for the year 1905 the mobile defence of Tonkin (1) was to consist of 1 destroyer for just 3 month, 3 non-active torpedo boats 1st class and submarines Oursin and Méduse.

Note
1. French protectorate encompassing what became after 1954 with northern Annam the state North Vietnam.