What is the National Stock Number (NSN) for the snorkel provided by US Divers?

The National Stock Number (NSN) is a 13-digit numeric code assigned to items in the supply system for the U.S. Department of Defense and ensures uniformity in cataloging and inventory management of equipment. For the snorkel provided by US Divers, the specific NSN identifies the precise item within the massive inventory essential for military and rescue operations.

In this scenario, option B identifies the correct NSN for the snorkel, 4220-01-227-7503, which corresponds to the specifications and manufacturer details of the product. This level of detail is crucial since misidentifying equipment can lead to complications during rescue operations, where the correct gear needs to be utilized swiftly. Understanding the association of NSNs with specific items is vital for maintenance and logistics in any operational context, especially in surface rescue scenarios where efficiency and readiness are critical.