MIL-SD-188-220 standard has specified the operations and functions of narrowband-based tactical networks. While the conventional tactical networks have mainly dealt with voice and short message data services, the future tactical networks are evolving towards broadband and multimediaenabled wireless Ad-Hoc networks. Therefore, this paper evaluates a network access method of the standard from the wideband network perspective, not narrowband perspective. In this paper, Deterministic Adaptable Priority Net Access Delay (DAP-NAD), one of the channel access methods specified in MIL-STD-188-220D with Change 1 standard, is simulated and evaluated over Wideband Networking Waveform–like environments in terms of Urgent precedence traffic. The simulation results conclude that unlike the narrowband environments, Bump-Slot, which is a unique time slot specified by the standard, does not play a critical role to enhance the performance in transmitting Urgent traffic over the wideband networks.