April 11th

National Submarine Day -

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Every year on April 11th, we commemorate National Submarine Day. This special occasion is dedicated to recalling the rich history and groundbreaking advancements in the field of submarine technology. Our world has seen major contributions from submarines, ranging from maritime exploration to scientific discoveries and strategic warfare tactics.

National Submarine Day is an invitation for all of us to appreciate the significant role these extraordinary vessels have, and continue to occupy in our contemporary lives. Let’s embark on a journey deep into the captivating realm of submarines.

History of National Submarine Day

The origination of this observance can be traced back to April 11, 1900, the day on which the U.S. Navy procured its earliest commissioned submarine, the USS Holland (SS-1). Thanks to John Philip Holland, an Irish-American innovator, the USS Holland became a substantial stepping stone in the evolution of naval defense. The procurement of this underwater vessel signified a crucial turning point in naval warfare history and led to the development of modern-day submarines.

Submarines play essential roles in varying fields like marine research, naval defense, and even tourism. National Submarine Day came into existence to acknowledge the value of these incredible underwater ships.

In global terms, countries like Australia celebrate this day on March 17 (St. Patrick’s Day), paying tributes to the lost AE1, Australia’s first submarine, believed to have disappeared on the same day in 1914. The Royal Navy in the UK also dedicates April 10 to their submarine force.

Regardless of the observation date, National Submarine Day is a testament to years of hard work, courage, and innovation in submarine creation, use, and technological advancement.

National Submarine Day Timeline

First Practical Submarine Design

Dutch engineer Cornelis Drebbel designed a practical submarine for James I of England.

Turtle: Military Submarine

American inventor David Bushnell used a submarine, named Turtle, in an attack against British navy.

HL Hunley: First Combat Win Submarine

The Confederate submarine HL Hunley attacked and sank the USS Housatonic, marking the first successful submarine attack in combat.

USS Holland: First Modern US Submarine

The United States commissioned the USS Holland (SS-1), its first modern submarine.

USS Nautilus: First Nuclear Submarine

The launch of the USS Nautilus, the world's first operational nuclear-powered submarine.

National Submarine Day

A day recognizing the history and contributions of submarines in naval warfare and scientific exploration.

Ideas to Celebrate National Submarine Day

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Submarine Movie Marathon

Gather your friends and family for a day-long movie marathon featuring films such as 'The Hunt for Red October', '20,000 Leagues Under the Sea', and 'Yellow Submarine'. This will not only entertain everyone but also introduce them to what defines a submarine.

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Visit a Submarine Museum

Many cities have nautical museums or historical WWII sites with actual submarines available for tours. Spend the day there, learn about the history of submarines, and understand the challenges faced by those who operate them.

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Dive into Submarine Literature

Immerse yourself in some classic submarine literature like ‘Das Boot’ or ‘Hunt for Red October.’ You can learn a lot about submarine warfare and life aboard them.

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Virtual Submarine Tour

Take a virtual tour of famous submarines available online. Virtual museum tours offer experiences you couldn't normally have, like visiting nuclear submarines or historic war vessels.

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Submarine Simulation Games

Enjoy the day playing submarine simulation video games such as Silent Hunter or Subnautica. Not only are they enjoyable, but they also give a glimpse into the strategic and operational aspects of submarines.

6 Interesting Facts About Submarines


Submarine Creation

The first working Submarine was created by Dutch engineer Cornelis Drebbel in 1620 under the commission of King James I of England. It was propelled by oars and could stay submerged for several hours.


Silent Running Operation

When submarines need to remain undetected, they utilize a method called 'silent running.' This involves shutting down non-essential systems to reduce noise.


Deep-sea Research Submarines

Submarine technology has allowed humans to explore some of the deepest parts of the ocean. The Deepsea Challenger, piloted by filmmaker James Cameron, dived nearly 36,000 feet into the Mariana Trench, the deepest part of the ocean.


Submarine Escape Training

Submarine crew undergo extensive escape training. This includes learning how to ascend from 600 feet underwater with just a mask and a special suit to protect from decompression sickness.


Submarine Communication

Communicating with submarines is complex and challenging. ELF (Extremely Low Frequency) is the common method. However, ELF communication is quite slow and only allows for very basic messages to be sent.


Deadliest Submarine Disaster

The most deadly submarine disaster in history occurred 1958. The American Thresher sank during deep-diving tests killing all 129 crew and shipyard personnel aboard..

National Submarine Day FAQs

Next National Submarine Day Dates

Year Date Day
2023 April 11th Tuesday
2024 April 11th Thursday
2025 April 11th Friday
2026 April 11th Saturday
2027 April 11th Sunday
What is the pattern? Every April 11th

National Submarine Day Word Search

  • Submarine
  • Undersea
  • Torpedo
  • Periscope
  • Navy
  • Radar