The German High Seas Fleet at Scapa Flow

At just 16 to 27 metres, the Karlsruhe is the shallowest of the seven German fleet wrecks and the one that gives most generously with bottom time. Forty minutes on a single dive is routine rather than exceptional here — long enough to properly explore a 151-metre light cruiser rather than merely visit one. She sits at about 45 degrees, starboard side down, hull and fittings remarkably well preserved for a ship that has spent more than a century underwater in Orkney tidal waters. The Karlsruhe belonged to the Konigsberg class of 1915, with 60mm belt armour, eight 15cm guns, torpedo tubes, and mine rails: a ship designed to sprint at 27.5 knots, lay death in the water, and fight her way home. For divers building confidence before tackling the deeper battleships, she offers an unhurried introduction to the scale and craftsmanship of the Kaiser's fleet.

Brummer earned her name — "Growler" in German — in October 1917, when she and her sister Bremse ambushed a British convoy bound for Norway and left two destroyers and nine merchant ships on the seabed in a single action. A century on, she lies on her starboard side in Cava Sound, one of the few German warships that salvage teams never touched. That neglect is the diver's gain. The brass bridge, gleaming dully in torch light, has become one of the defining images of Scapa Flow diving. Mine rails run along the deck where 400 contact mines once sat ready for deployment, and scattered arsenal pieces litter the seabed around the hull. At 22 to 36 metres, the Brummer sits in a comfortable depth band for advanced sport divers and rewards repeat visits — every pass along the hull seems to reveal another fitting the salvage crews left untouched.

Last of the line. The Coln was the lead ship of the final class of light cruisers the Imperial German Navy would ever build, and she arrived too late to fire a shot in anger. Today she is the most intact of the four cruisers left in Scapa Flow, lying on her starboard side with many prominent deck features still in place. At 155 metres long and capable of 27.5 knots, these were serious fighting ships — eight 15cm guns, torpedo tubes, mine rails for 200 contact mines, and a complement of 559 men. The wreck rewards a methodical circuit: starboard side in 34-36 metres, with the top of the hull at a manageable 22. Navigation is straightforward, making the Coln the cruiser most often recommended to divers stepping up from blockship depths for the first time. The reward is a warship that still looks like a warship, every rivet and fitting a monument to the industrial ambition of a navy that briefly challenged British supremacy at sea.

Most divers meet the Dresden on their first morning in Orkney. She has become the traditional opening dive of a Scapa week, and for good reason: the bow rests at 23 metres, shallow enough for a conservative shakedown after a long journey north, while the stern drops away to 38, deep enough to stretch the legs later in the trip. That versatility is no accident of geography — the Dresden lies on her port side along a natural gradient, the hull itself mapping out a progression from comfortable to challenging. Sister ship to the Coln and one of the last light cruisers the Kaiser's yards would ever launch, she carried eight 15cm guns, torpedo tubes, and rails for 200 mines at close to 28 knots. The wreck retains intact sections along much of its length, and the depth profile means a single dive can encompass both a leisurely survey of the shallows and a purposeful push into the darker water beyond.

Ravaged by decades of industrial salvage, the Konig offers something none of the other Scapa battleships can: a cross-section through the guts of a WWI dreadnought. Where Metal Industries tore away hull plating and superstructure in the 1960s, the armoured citadel now stands exposed — twelve inches of dovetail-jointed steel that once protected the magazines. Seven casemate guns lie upside down on the seabed along the starboard side like fallen dominoes. The wreck is the least-dived of the three battleships, partly because pre-dive route planning is essential amid the tangled debris field of wires, blocks, and davits. That quietness is its own reward: schools of pollock patrol the wreckage undisturbed, and a careful diver can spend an entire dive tracing the skeleton of a ship that traded broadsides at Jutland.

Where other Scapa battleships demand technical qualifications, the Kronprinz Wilhelm meets experienced sport divers on their own terms. Her tilted posture — port side uppermost, starboard buried in the seabed — places the shallowest hull plating at just twelve metres and stretches the dive profile all the way down to 43 at the deepest point. The real draw is the main armament: half of the original complement of 12-inch guns remain visible and reachable, turret after turret lined up along a hull that still measures 146 metres on the seabed. It is the closest most recreational divers will ever come to comprehending the firepower of a dreadnought. Diveable at any state of tide and usually marked with two small buoys, the Kronprinz is the most forgiving of the three battleships — and arguably the most spectacular for the qualification required.

Often called the jewel of Scapa Flow, the Markgraf is the deepest and best-preserved of the three battleships still resting on the seabed. At 47 metres her keel breaks the surface of diver ambition — this is not a dive you stumble into, but one you train for. The reward is a warship that still looks like a warship: intact bow, stern, and rudders convey the sheer scale of a 175-metre dreadnought that once carried over a thousand men into the maelstrom at Jutland. Because the superstructure caught on the seabed before she could roll fully, much of the underside architecture remains visible rather than crushed. Visibility can swing from five to fifteen metres with the tide, so timing matters. For divers qualified at extended range, the Markgraf is the definitive Scapa experience — a cathedral of riveted steel suspended in the cold, green half-light of Cava Sound.