Here's why:
* Historically, ships had designated spaces for sick and injured sailors. These spaces were often called "bays" because they were typically located in a compartment or alcove on the ship.
* The word "sick" refers to illness or injury.
* The term "sick bay" became common during the 18th and 19th centuries, when naval warfare was prevalent.
The term has since spread to other contexts, such as:
* Schools: Schools often have a designated "sick bay" or "health room" for students who are feeling unwell.
* Hospitals: While not as common, some hospitals may use "sick bay" to refer to specific areas for observation or short-term treatment.
While the exact origin of the term might be debated, the association with naval tradition is widely accepted.