5.8        AprilTags

AprilTags are 8⅛ in. (~21 cm) square targets located above CAGES, PROCESSORS, CORAL STATIONS and on REEFS. There are 22 unique markers on the FIELD, positioned as shown in Figure 5‑22.

Figure 5‑22 AprilTag locations

All markers are from the 36h11 tag family, IDs 1-22. All AprilTags are mounted to and centered on a 10½ in. (~27 cm) square polycarbonate panel. Each marker has an identifying text label. If AprilTags experience wear and marking during MATCHES, they are repaired with gaffers tape.

Figure 5‑23 AprilTag sizing

CORAL STATION AprilTags (IDs 1, 2, 12, and 13) are mounted to the CORAL STATION. The bottom of each tag’s panel is 4 ft. 5¼ in. (~135 cm) above the carpet and centered on the CORAL STATION.  

Figure 5‑24: CORAL STATION AprilTags

PROCESSOR AprilTag panels (IDs 3 and 16) are 3 ft. 9⅞ in. (~117 cm) above the carpet and centered horizontally above the opening in the PROCESSOR WALL.

Figure 5‑25: PROCESSOR AprilTags

REEF AprilTag plates (IDs 6-11 and 17-22) are 6⅞ in. (~17 cm) above the carpet and centered horizontally on each of the faces REEF.

Figure 5‑26: REEF AprilTags

BARGE AprilTag plates (IDs 4, 5, 14, 15) are 5 ft. 9 in. (~178 cm) above the carpet, approximately centered above the middle CAGE, and angled 30° from vertical.

Figure 5‑27: BARGE AprilTags

For further marker locating information please refer to the 2025 ARENA Layout and Marking Diagram. Printable versions of the markers are available on the 2025 Playing FIELD webpage.