A Smoke Screen for a Convoy

The Dummy Deck-house of a Decoy Ship

A Convoy Zigzagging

A Convoy with an Airship

Drifters at Sea

A Paddle Minesweeper

A German Mine on the Surface

Two Depth Charges after Explosion

The Tell-tale Oil Patch

A Submarine Submerging

Periscope of Submerged Submarine Travelling at Slow Speed

A Submarine Submerged




LIST OF CHARTS