The navy maintains a global presence with numerous bases around the world. A blue-water navy refers to a maritime force that has the capability to operate on a global scale, particularly in the deep waters of open oceans. Large ships such as aircraft carrier groups, submarines, destroyers, and fleet auxiliary ships travel extensively across the globe. Smaller naval vessels are also stationed in proximity to their designated areas of operation. Aircraft carriers serve as floating airfields, carrying fighter aircraft and featuring runways for the takeoff and landing of multi-role aircraft. A single carrier can accommodate approximately 60-100 aircraft. Carrier groups are highly capable naval platforms and are regarded as formidable forces when deployed. Submarines, on the other hand, operate underwater and possess a range of deterrent weapons. They are stealthy assets of the navy used for engaging enemy ships and deploying missiles. Submarines can remain submerged on patrol for periods exceeding six months. The navy also employs specialized ships for various purposes. These include command ships, coastal patrol boats, mine countermeasures ships, submarine tenders, joint high-speed vessels, sea fighters, submersibles, frigates, corvettes, patrol craft, fast attack craft, oceanographic survey ships, and surveillance ships. The essay provides an overview and analysis based on secondary information and the author's extensive practical experience in shipbuilding and as a seafarer. It serves as an informative paper, briefly describing common types of naval ships in general and warships in particular. The author offers insights into the historical chronology and technological advancements in naval ship design and development, as well as the appropriate combination of weapons and sensors to achieve optimal fleet selection for any navy.