Final answer:
The first milestone in the history of a ship that is generally a simple ceremony is the keel-laying ceremony. This ceremony marks the official start of the ship's construction.
Step-by-step explanation:
The first milestone in the history of a ship that is generally a simple ceremony is known as the keel-laying ceremony. This ceremony marks the official start of the ship's construction. During the ceremony, the ship's keel, which is the bottommost structural piece of the ship, is laid in place, often with a commemorative coin or other object placed under it for good luck.
One example of a keel-laying ceremony is the tradition in the United States Navy, where a silver dollar is placed under the keel of a new ship. This tradition dates back to ancient times when Romans believed that it would appease the gods of the sea and bring good fortune to the ship's crew.
The keel-laying ceremony is a significant event in the life of a ship, symbolizing the beginning of its construction and the hopes and dreams associated with its future voyages.