General Data

Projectiles Used In 5"/25, 5"/38, 5"/51 A.A. Commmon. Mk 53 all Mods except Mod 0 are recommended for use in 5"/51 guns at full charge.

Markings

Mk 53 Mod _____

Model _____ Lot _____

Over-All Dimensions and Weight

Weight

4.91 lb.

Material. Green ethyl cellulose plastic nose ogive molded integral to steel base ring; steel body cylinder.

Compression-Type Waterproofing

only

Description

Description and employment of this fuze is the same as for Mk 53 Mods 0-2 except that the minimum range is 400 yards instead of 700 yards.

Remarks

This fuze replaced the VT Fuzes Mk 32 and Mk 40.

Mk 53 Mod 4 is identical in all operational and physical characteristics to the Mk 53 Mod 3, except that it operates at a different frequency than the Mod 3. This change in fre-quency was made as a countermeasure protection.

Mk 53 Mod 5 is identical to Mod 4 except that the body cylinder of the fuze is 0.316 inch longer in order to accommodate the compression type of waterproofing between the body of the VT fuze and the auxiliary detonating fuze. The length of the projectile cavity to the lower face of the auxiliary detonating fuze remains the same as previous mods; but because of the long body cylinder the distance to the shoulder of the cavity is in-creased; hence, Mod 5 will not fir any previous projectile cavity.

Mk 53 Mod 6 is identical to Mod 5 in operational and pfysical characteristics, except that it operates at a different frequency (same as Mod 3). Mod 6 is physically interchangeable with Mod 5, but not with any previous mod.

Figure 11. VT Fuze Mk 53 Mods 5 and 6.