diff --git a/infra/build-server/devnet3/devnet3.sh b/infra/build-server/devnet3/devnet3.sh
index d8a97319..a3daa87f 100755
--- a/infra/build-server/devnet3/devnet3.sh
+++ b/infra/build-server/devnet3/devnet3.sh
@@ -35,7 +35,9 @@ REMOTE
 case "$mode" in
   seed) start_one dn3-seed "$DN3_SEED_APPDIR" "0.0.0.0:$DN3_SEED_P2P" "$DN3_SEED_RPC" "$DN3_SEED_JSON" "$DN3_SEED_EVM" "$DN3_SEED_LOG" --maxinpeers=128 --outpeers=8 ;;
   node1) start_one node1-dn3 "$DN3_NODE1_APPDIR" "0.0.0.0:$DN3_NODE1_P2P" "$DN3_NODE1_RPC" "$DN3_NODE1_JSON" "$DN3_NODE1_EVM" /srv/hands/node1-dn3.log --enable-unsynced-mining --addpeer=127.0.0.1:$DN3_SEED_P2P --maxinpeers=128 --outpeers=8 ;;
-  observer-node) start_one observer-dn3 "$DN3_OBS_APPDIR" "127.0.0.1:$DN3_OBS_P2P" "$DN3_OBS_RPC" "$DN3_OBS_JSON" "$DN3_OBS_EVM" /srv/hands/observer-dn3.log --addpeer=127.0.0.1:$DN3_NODE1_P2P --addpeer=127.0.0.1:$DN3_SEED_P2P ;;
-  status) "${SSH[@]}" "for l in $DN3_SEED_LOG /srv/hands/node1-dn3.log /srv/hands/observer-dn3.log; do [ -f \$l ] && { echo \"== \$l\"; head -1 \$l | cut -c1-100; grep -oE 'Consensus params digest: [0-9a-f]+|genesis [0-9a-f]+ executed' \$l | head -2; tail -1 \$l | cut -c1-120; }; done; ss -ltn | awk '{print \$4}' | grep -E ':(26631|26651|26661|27630|26650|26660)\$' | tr '\n' ' '; echo" ;;
+  observer-node)   # the fleet lane's instance: its unit (installed 16:39Z, disabled); IGNEUMD_DN3 and DN3_PEERS come from /srv/hands/dn3/dn3.env
+    if [ "$GO" = 0 ]; then say "DRY observer-node: sudo systemctl enable --now igneum-observer-node-dn3 (reads $DN3_OBS_SCRIPT; dn3.env IGNEUMD_DN3 must name the 0.3.22 artefact)"; "${SSH[@]}" 'grep -E "^(IGNEUMD_DN3|DN3_PEERS|DN3_LISTEN)=" /srv/hands/dn3/dn3.env'; else
+      ssh -i "$KEY" -o BatchMode=yes "root@${HOST#*@}" 'systemctl enable --now igneum-observer-node-dn3 && sleep 8 && systemctl is-active igneum-observer-node-dn3 && journalctl -u igneum-observer-node-dn3 --since "-60 s" --no-pager | grep -oE "igneumd/[^ ]+|Consensus params digest: [0-9a-f]+|genesis [0-9a-f]+ executed|P2P Server starting on: [^ ]+" | head -4'; fi ;;
+  status) "${SSH[@]}" "for l in $DN3_SEED_LOG /srv/hands/node1-dn3.log; do [ -f \$l ] && { echo \"== \$l\"; head -1 \$l | cut -c1-100; grep -oE 'Consensus params digest: [0-9a-f]+|genesis [0-9a-f]+ executed' \$l | head -2; tail -1 \$l | cut -c1-120; }; done; ss -ltn | awk '{print \$4}' | grep -E ':(26631|26651|26671|27630|26650|26670)\$' | tr '\n' ' '; echo" ;;
   *) sed -n '2,12p' "$0" | sed 's/^# \{0,1\}//'; exit 2 ;;
 esac