On April 9, 2024, Russian-operated Baltic GPS jammer activated at 15:20 UTC, initially interfering with navigation for about 40 planes, then reducing to affect only aircraft in Gdansk, Poland.

On April 9, 2024, starting at 15:20 UTC, the Russian Baltic GPS jammer began operations emitting high output signals that disrupted navigation systems on approximately 40 unique aircraft. This represented the highest output since a similar event on March 27, 2024. After roughly 30 minutes, the jammer's intensity was reduced, narrowing its interference impact to planes operating near Gdansk, Poland. The jammer operation ended within an hour, marking this as the shortest full-effect Baltic jammer run recorded to date, lasting about 30 minutes at full power. The jammer had previously operated mainly at low power affecting only the Gdansk area. This event was monitored and reported by aviation tracking and monitoring sources.