[2] The boats of the V25 class varied in dimensions, and they gradually increased in size as more vessels were built.

When serving as half-flotilla flagships, the boats would have a flotilla leader's staff of three officers and thirteen to fifteen enlisted men in addition to the standard crew.

As a result, cruising radius varied significantly, from 1,080 to 1,810 nautical miles (2,000 to 3,350 km; 1,240 to 2,080 mi) at 20 knots (37 km/h; 23 mph), with the first dozen boats having the least endurance.

[5] Each boat initially carried three 8.8 cm (3.5 in) SK L/45 guns in single mounts, one forward and two aft, all on the centerline.

During World War I, V25 briefly had her center gun removed to make room for a Friedrichshafen FF.33 seaplane.

[6] Strictly speaking, the 1913 series consisted only of V25 to V30 and S31 to S36 ships, but the later ones listed here were quite similar, though increasing in displacement.

The German practice in peacetime was to build one flotilla of similar ships per fiscal year, hence the name 1913 series.

[6] Despite the British naval blockade of Germany, many of the ships saw service in the English Channel, the North Sea and especially the Baltic.