A proximity-type fuze suitable for use against ground targets below a high ground cover, or canopy, such as a thick layer of high foliage. As the fuze approaches the canopy the firing signal resulting from the proximity of the canopy is utilized to operate an explosive switch or other form of latching relay, that closes a short time after receiving the firing signal. Closing of the switch connects the detonator to the firing circuit. A delay circuit allows the fuze to penetrate the ground cover before the firing circuit can again be activated. When the fuze approaches the ground the proximity of the ground produces a second firing signal which will fire the detonator.
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