Which of the following is NOT a recommended practice when using the hundred-block system?

• A. Always include nearby landmarks and cross streets.
• B. Verify with landmarks or cross streets when possible.
• C. Use mobile mapping tools for verification.
• D. Rely solely on the block number without cross streets or landmarks.

Answer: (D)

In the hundred-block system, locating a place accurately means tying the block number to real-world references like cross streets and nearby landmarks. The block number narrows you to a general area, but without anchors, there can be multiple places that share the same block number, and changes to streets or block boundaries can create confusion. Including cross streets and landmarks gives responders a precise way to identify the exact block and side of the street, reducing the chance of confusion.

Verifying with landmarks or cross streets whenever possible strengthens accuracy, and using mobile mapping tools adds a visual check that confirms the written description matches the actual location. Relying solely on the block number removes those crucial reference points, increasing the risk of miscommunication and delayed or misdirected response.