Abstract:
This study investigates the impact of GPS signal disruptions caused by military activity,
particularly during international voyages in geopolitically sensitive waters. Aboard MV.
Glovis Daylight, significant disruptions occurred during a voyage between Canada and
Korea, attributed to ballistic missile testing by North Korea. This interference caused a
phenomenon known as “GPS jumping,” where the vessel’s position was incorrectly
shown on land, leading to confusion, navigation errors, and potential safety hazards.
Unlike previous research that primarily focused on natural interference, this study
highlights military operations as a major source of GPS signal disruption. The main
research objective is to examine how such disruptions influence navigational performance
and maritime safety. Using a quantitative descriptive approach, data were collected through structured questionnaires and direct observations of the ship’s crew. Statistical analysis was conducted using SPSS 26. Findings reveal that GPS disruptions significantly reduce navigation accuracy, increase
route deviation risks, and delay communication with shore. Around 80% of respondents
confirmed that military activity had a direct operational impact on the vessel.
The study concludes that missile tests and military exercises pose real threats to
navigational safety in international waters. Recommendations include improving crew
training, using alternative navigation systems, and establishing international protocols to
manage military activity near shipping lanes.
