Greyhound (2020) Timeline Explained – Every Event in Order

Krause breaks radio silence when there are only 14 hours remaining until RAF air support arrives. With the convoy under relentless attack from the U-boat wolf pack and his ship running dangerously low on depth charges, he sends a desperate one-word message, "help", to the Admiralty requesting immediate assistance. This decision reflects the dire circumstances and his realization that waiting any longer could result in the complete destruction of the convoy.

• radio silence
• Admiralty
• desperate message
• air support

The Black Pit refers to the Mid-Atlantic region where the convoy travels without any air cover from land-based aircraft. This 50-hour stretch leaves the ships completely vulnerable to U-boat attacks, as they cannot receive aerial support or reconnaissance. The absence of air protection creates the most dangerous phase of the convoy's journey, which is exactly when the German wolf pack chooses to strike.

• Black Pit
• Mid-Atlantic
• air support
• convoy vulnerability

Greyhound successfully sinks four U-boats throughout the battle. The first is destroyed early in the engagement when Krause uses sonar to locate it and deploys depth charges. The final kill occurs during the last assault when Greyhound takes down the lead U-boat just as British RAF Coastal Command air support arrives, forcing the remaining submarines to scatter.

• U-boats sunk
• depth charges
• Wolf Pack
• enemy submarines

After the oil tanker is struck by a U-boat torpedo, Krause faces a critical tactical decision. Rather than pursuing the attacking submarine to sink it, he chooses to prioritize rescuing the endangered sailors in the water. This decision reflects his core leadership philosophy, saving lives takes precedence over destroying the enemy, even though it means allowing the U-boat to escape and continue posing a threat.

• oil tanker
• rescue operation
• tactical decision
• U-boat escape

George Cleveland, the Mess Attendant 2nd Class played by Rob Morgan, is killed during a fierce engagement with the U-boats. When Greyhound is struck, Cleveland dies alongside fellow sailors. His death represents the first major loss of a named crew member and devastates Commander Krause and the remaining crew, significantly impacting morale during the ongoing battle.

• Cleveland death
• crew loss
• morale
• Mess Attendant

Ernest Krause's first command during wartime is significant because he has extensive naval training but zero combat experience. This is his inaugural mission as commanding officer in active conflict, making every decision, from tactical maneuvers to crew management, a test of his abilities under extreme pressure. His inexperience contrasts sharply with the seasoned German U-boat commanders he faces, adding tension to every choice he makes.

• first command
• Krause inexperience
• wartime leadership
• Tom Hanks character

Greyhound survives through a combination of tactical skill, careful resource management, and timely reinforcements. Krause accurately deduces the wolf pack's strategy, five U-boats positioned at the front and one at the rear, waiting for darkness to attack. He strategically maneuvers his ship to intercept, while rationing his limited depth charges (down to just six by the final assault). The arrival of RAF Coastal Command air support at the critical moment forces the remaining U-boats to retreat.

• wolf pack
• tactical maneuvering
• depth charges
• RAF Coastal Command

The U-boats launch their coordinated assault at night because darkness provides them with tactical advantages they lack during daylight. Under cover of night, the U-boats can approach the convoy undetected, launch torpedoes with less risk of being spotted by lookouts, and exploit the darkness to escape counterattacks. Krause correctly predicts this strategy, understanding the wolf pack is waiting for nightfall before executing their synchronized attack on the vulnerable merchant vessels.

• night attack
• wolf pack strategy
• torpedo launch
• darkness advantage

HMS Diamond's message confirms that relief is on the way for Greyhound and the surviving convoy ships. This communication signals the end of the ordeal, as the Admiralty has dispatched a destroyer to assist and escort the battered vessels to safety. It represents the successful completion of their mission and provides the crew with the assurance that they will reach Derry for repairs.

• HMS Diamond
• relief ship
• Derry
• convoy survival

Commander Krause commands the USS Keeling DD-548, which carries the radio call sign "Greyhound." This call sign is used for identification and communication purposes during naval operations. The name evokes the ship's intended characteristics, speed, agility, and endurance, qualities essential for evading torpedoes and pursuing submarines across the Atlantic.

• USS Keeling
• Greyhound call sign
• radio identification
• destroyer