The British Destroyer That Crippled A Battleship With One Torpedo

June 8th, 1940.

Norwegian Sea, unlimited visibility, calm water.

A 1350 ton British destroyer, 10 years old, armed with 4.7in guns and torpedoes, is charging directly at Shanhost.

A 38,000 ton German battleship protected by 320 mm of croo cemented armor.

A caster’s guns cannot scratch that hull.

Her shells weigh 50 lb.

Shanho’s weigh 727.

The German battleship’s 11in guns can hit targets at 15 mi and beyond.

A caster must close to less than 4 miles just to have a chance.

Every officer aboard knows this is a one-way trip.

Commander Charles Glasford addresses his crew over the broadcast system.

You may think we are running away from the enemy, he says.

We are not.

Our captain has ordered us to attack the Shanhost with torpedoes.

If any man wishes to write a last letter home, he may do so.

A caster turns and charges.

Within the hour, one of her torpedoes will strike Shanho with such force that it knocks both German capital ships out of the war for months during the most dangerous summer in British history.

To understand why that torpedo mattered, you need to understand how three British warships ended up alone and defenseless in waters crawling with German battleships.

HMS Glorious was an aircraft carrier of roughly 25,000 tons displacement.

Originally built as a courageous class battle cruiser during World War I, she had been converted in the late 1920s.

On her final voyage, she carried approximately 36 aircraft, including 10 Hawker Hurricanes of number 46 Squadron RAF.

Those hurricanes had made aviation history just hours earlier.

Squadron leader Kenneth Cross had orchestrated the first ever deck landing of monoplane fighters without arrest or hooks.

All 10 landed safely.

All would be lost within hours.

The reason Glorious was steaming independently towards Scarpa Flow lay in one of the war’s most bitter command feuds.

Captain Guy Doy Hughes, a decorated World War I submariner, had clashed violently with his commander heir, JB Heath.

Doy Hughes had Heath arrested and removed from the ship, accusing him of cowardice in the face of the enemy.

One strong theory now taken seriously by several official historians is that Doy Hughes requested permission to proceed independently to Scaper Flow, specifically to prepare for court marshall proceedings against Heath.

Whatever his precise motive, Vice Admiral Wells granted the request.

Doy Hughes steamed into the Norwegian Sea with only two destroyer escorts, Ardent and Acastaster, at 17 knots.

Bletchley Park’s naval section had predicted a German breakout based on traffic analysis, but the warning was not passed to the home fleet.

Norwegian coastal observers spotted the German ships heading north and reported to the RAF, who assumed the Navy already knew.

Nobody warned Glorious.

The consequences were catastrophic.

With Heath ashore, nobody insisted on flying combat air patrol.

No aircraft were aloft or even ranged on deck.

The crow’s Nest lookout was unmanned.

The ship was steaming on reduced boilers, capping her speed well below what she could make at full power in conditions of perfect visibility and calm seas.

A 25,000 ton aircraft carrier was effectively blind, slow, and defenseless.

Meanwhile, Shanho and Naisenau were executing operation Juno, a sorty into the Norwegian Sea under Admiral Wilhelm Marshall.

Shanhorse displaced 32,100 tons standard, 928 cm guns in three triple turrets.

Main belt armor 320 mm of crop cemented steel.

Maximum speed 31 1/2 knots.

She carried Fumo 22CAC radar capable of surface search to approximately 10 nautical miles.

Her sister Gnisel was essentially identical.

Both ships were among the most powerful surface warships Germany possessed.

Against this force stood HMSaster and her sister Ardent, a class destroyers, 1350 tons standard displacement.

Four single 4.7 in guns firing 50 lb shells.

Eight 21in torpedo tubes in two quadruple mountings.

No radar.

Maximum speed 35 1/2 knots.

Built by John Brown and company at Clyde Bank.

A caster had been launched in August 1929.

By 1940, she was considered elderly, superseded by newer tribal class and J-class destroyers.

Her fire control consisted of a pedestal-mounted director site with a 9- ft rangefinder, no gyro stabilization, no blind fire capability, an obsolescent ship facing the most modern capital ships in the Creeks Marine.

The core problem was simple.

Nothing aboard a caster could penetrate Shanhost’s armor.

The 4.7in shells would shatter on impact against 320 mm of cemented steel.

The only weapon capable of threatening a capital ship was the 21-in torpedo.

Striking below the water line, it bypassed belt armor entirely, but getting within torpedo range meant closing to 3 to 5 m under fire from guns designed to kill at 10 times that distance.

Destroyers sometimes do the unthinkable.

HMS Glowworm had proved that just 2 months earlier, ramming Admiral Hipper and earning aostumous Victoria Cross.

Acasta was about to prove it again.

Nobody aboard would have the luxury of knowing it at the time.

At approximately 1546, midshipman Goss in Shanho’s fortop spotted smoke on the horizon at roughly 25 nautical miles.

Nobody else had seen it.

Goss insisted.

Admiral Marshall ordered investigation.

By 1610, the target was confirmed as an aircraft carrier with two escorts.

At 1627, Shanhost opened fire.

Her third salvo scored a hit on Glorious at a range of roughly 24,000 m, approximately 15 mi.

One of the longest range naval gunfire hits in history.

The 727lb shell punched through the flight deck and exploded in the upper hanger.

Aircraft caught fire.

A steam line ruptured.

Any hope of launching torpedo bombers died in that instant.

Around 1700 hours, a shell struck Glorious’s bridge, killing Captain D.

Oily Hughes and most bridge personnel.

At 1720, a hit in the center engine room destroyed propulsion.

Glorious began circling slowly, listing badly to starboard.

She was finished.

Ardent attacked first.

Under Lieutenant Commander JF Barker, she laid smoke screens that shielded Glorious for over 20 minutes.

She made seven torpedo attack runs against the German battleships.

All torpedoes were evaded, though one passed close ahead of Shanhost.

Her 4.7in guns scored one confirmed hit, causing negligible damage.

Shanhost’s captain later acknowledged that Ardent’s conduct was outstanding, noting her crew outmaneuvered the fall of shot very capably and used smoke with great skill.

Ardent was hit repeatedly and sank at approximately 1725.

of her crew of roughly 1552 were killed.

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With Ardent gone and glorious burning along her entire length, Commander Glassford made the decision that defined the engagement.

A caster drove up to full speed, every knot she could ring from an aging plant, smoke pouring from her funnels.

Leading seaman Nick Carter, manning a torpedo mount, recalled thinking they were fleeing.

Then came the announcement, “They were not running, they were attacking.” Using smoke floats and funnel smoke, Glassford closed to short range, unseen.

A caster emerged from the smoke, turned to starboard, and fired.

The first salvo missed.

With extraordinary audacity, Glford turned back for a second run.

This time, he fired four torpedoes from the second quadruple mounting.

Within minutes, the crew watched an orange flash glow against the dark hole of Shanhost.

The torpedo struck on the starboard side abressed the aft turret, tearing a hole approximately 14 by 6 m in the hole.

The British 21-in torpedo carried roughly 340 kg of explosive, significantly exceeding the 250 kg that Shanho’s underwater protection was designed to withstand.

2,500 tons of seawater flooded into the ship.

The aft turret was knocked out of action.

The starboard propeller shaft was destroyed.

The center shaft was disabled.

Only the port shaft remained operational.

Speed dropped to 20 knots.

The ship lifted 4 to 5° to starboard.

48 German sailors were killed.

Shanho’s return fire was immediate and devastating.

11-in shells slammed into a caster amid ships, destroying the engine room.

With all communications to the bridge severed, Carter personally fired the remaining torpedoes on his own initiative.

Commander Glasford ordered abandon ship.

A caster sank stern first at approximately 1820.

Of 161 crew, two were pulled from the sea.

Only Carter lived aboard Ganesa.

Now the crew reportedly lowered Acastaster’s battle flag to half mast and came to attention as she went down.

Even the enemy recognized what they had just witnessed.

Glorious had already capsized and gone down at approximately 1810.

Across all three ships, 1,519 men died.

Only about 40 survived.

Over 900 men had abandoned Glorious alive, but died of exposure in Arctic waters over the following three days before rescue arrived.

The damage to Shanho forced Admiral Marshall to abandon Operation Juno immediately.

Without escorts, Gnis now had to accompany the crippled ship rather than continuing to hunt independently.

This withdrawal had cascading consequences.

A 22 ship convoy carrying approximately 14,000 Allied troops was steaming through the same waters.

Had Marshall’s force remained operational, those transports would have been desperately vulnerable.

Acasta’s torpedo saved them.

HMS Devincshire carrying King Haken IIth of Norway and the Norwegian government was only 30 to 50 mi away.

She had intercepted Glorious’s distress signal, but maintained radio silence under orders.

The German withdrawal likely saved her, too.

The chain reaction continued.

When Shanhorse limped toward Tronheim for emergency repairs, Gisau sorted to cover the withdrawal.

During that covering operation, Gisau was herself torpedoed by submarine HMS Clyde, suffering severe bow damage.

Both German capital ships were now out of action.

Shanho was knocked out for months, undergoing repairs at Keel from late June well into the autumn.

She did not return to major operations until late January 1941.

Naisenau was similarly unavailable until early 1941.

The timing was extraordinary.

During the critical summer of 1940, as Britain faced potential invasion under Operation Sea Lion, the Creeks Marines effective surface fleet was reduced to one heavy cruiser, two light cruisers, and four destroyers.

The Norwegian campaign had already destroyed 10 German destroyers at Narvik.

Now the absence of both Shanhost and Ganisau left Germany unable to provide any meaningful surface naval support for a cross channel invasion.

Grand Admiral Rder emphasized to Hitler the impossibility of attempting a seaborn assault with such depleted forces.

Grand Admiral Dernitz later acknowledged that Germany possessed neither control of the air nor the sea, nor was it in any position to gain either.

A 1350 ton destroyer had disabled a 38,000 ton battleship for months, ended a major German naval operation, saved a convoy of 14,000 troops, indirectly led to Ganesa being torpedoed as well, removed both capital ships from service during the months when Britain stood most alone.

The cost benefit calculation is staggering.

Acastaster had been built for roughly £228,000 in 1929.

Shanhost’s repairs consumed months of dockyard capacity at Deutscheka Keel, tying up skilled labor and materials that Germany desperately needed for yubot construction.

Admiral Marshall, despite having sunk an aircraft carrier, two destroyers, a troop ship, a tanker, and a twler, was sacked as fleet commander for deviating from orders.

His replacement was Admiral Gwent Lurch, who would die aboard Bismar less than a year later.

Commander Glasford was recommended for aostumous Victoria Cross.

The Admiral T rejected it, claiming no surviving senior officers could provide testimony.

After the war, German naval records emerged, praising both destroyers in extraordinary terms.

German officers acknowledged that the audacity and pluck of the British destroyers was outstanding and that every officer taking part agreed the crews gave their utmost despite facing impossible odds.

The Victoria Cross recommendation was submitted again, rejected again.

Sir Edward Bridges, Churchill’s wartime cabinet secretary, wrote that reopening the case would also reopen the Board of Inquiry.

Political expediency defeated military justice.

Lieutenant Commander RP of HMS Glowworm who rammed the heavy cruiser Admiral Hipper just two months earlier received his postumous Victoria Cross partly on the recommendation of the German captain.

Glassford and Barker received nothing beyond mentions in dispatches.

Carter himself was branded a liar by the Admiral T when his account was initially dismissed.

A translation error in German records had transposed the identities of the two destroyers, crediting the torpedo hit to Ardent instead of a caster.

Carter was not vindicated until 1947.

The board of inquiry findings were sealed.

They remain classified until 2041.

The wrecks of all three ships have never been found.

They lie somewhere in roughly 3,500 m of water in the Norwegian Sea.

Multiple memorials now stand in their honor.

From South Sea Common in Portsmouth to Harstad in Norway, but the ships themselves remain where they fell.

What endures is the image Carter carried for the rest of his life.

His captain on the bridge of a sinking ship, duty done, waving goodbye to the men on the rafts, then calmly taking a cigarette from his case, tapping it firmly two or three times, as people used to do in those days, and lighting it.

Seconds later, HMS Acastaster slid beneath the Norwegian Sea with Commander Glasford still on the bridge.

A 10-year-old destroyer, 4.7in guns that could not scratch a battleship’s hull, one torpedo that changed the summer of 1940.

That is British naval excellence, not measured in displacement or caliber, measured in the willingness of 161 men to charge into certain destruction because their duty demanded nothing less.

The specifications prove it.

The combat record confirms it.

The strategic consequences validate it.

Skeptics called it suicide.

History called it decisive.