What is the nomenclature for the point detonating fuse?

The nomenclature for the point detonating fuse includes various types designed for different applications. The M739A1, M557, and MK 399 MOD 1 are all recognized fuses used in artillery ammunition, particularly with the M777A2 Howitzer.

The M739A1 is commonly used in high-explosive projectiles, providing reliable detonation upon impact. The M557 also serves as a point-detonating fuse and is known for its capabilities in specific types of projectiles, enhancing effectiveness on the battlefield. The MK 399 MOD 1, while it may serve different ordinance applications, is also a recognized point-detonating fuse.

Each of these fuses has unique characteristics and applications in military operations, making it essential that they are all correctly identified as point detonating fuses. Therefore, acknowledging that they all fall under the category of point detonating fuses justifies the selection of the response indicating all of the above.