Recent discussions have emerged regarding whether the United States should be granted broad overflight access across Indonesian airspace. Although this may appear to be a technical or operational matter, the proposal carries significant legal and strategic implications for Indonesia’s status as a neutral state.
The Legal Conflict of Neutrality
Under Article 2 of the Hague Convention V, belligerents are forbidden from moving troops, supplies, or convoys of munitions of war across the territory of a neutral power. Even though originally designed for land warfare, this logic extends to airspace, which is considered inviolable territory.
If Indonesia were to allow blanket overflight for a belligerent power, it could be viewed as a classic violation of neutrality. This becomes particularly relevant in the current context of the armed conflict between the United States and Iran.
Defined Routes vs. Blanket Access
Maritime law provides some nuance through the United Nations Convention on the Law of the Sea (UNCLOS). Articles 38 and 53 grant aircraft the right of transit passage through designated sea lanes and straits used for international navigation.
Here’s further supported by paragraph 28 of the San Remo Manual on International Law Applicable to Armed Conflicts at Sea. But, these rights are strictly tied to defined routes, such as the ALKI lanes or the Strait of Malacca.
Unrestricted overflight exists outside this framework. It is not a general freedom to operate across all airspace, but a specific right limited to corridors and the requirement of expeditious transit.
Tactical Advantages and Predictability
Limiting flights to international straits and ALKI lanes makes military movements constrained and predictable. An opposing belligerent, such as Iran, can calculate likely entry and exit points, such as the southern approaches of the Sunda Strait.
This predictability allows for the tracking and potential interception of aircraft. Blanket overflight would remove this layer of predictability, as aircraft could enter and exit Indonesian airspace at multiple points.
The Risk of Escalation
Neutrality law functions as a self-help system. If a neutral state is perceived as unwilling to enforce its neutrality, the aggrieved belligerent may experience entitled to protect its own rights.
In this scenario, allowing broad overflight could be interpreted as a policy choice rather than an incapacity. This may lead an opposing power, such as Iran, to argue that it could intercept US military aircraft even within Indonesian airspace.
Such a development would be politically sensitive and escalatory. It raises critical questions about how similar overflight arrangements might play out in a future US-China contingency involving the South China Sea or Taiwan.
Frequently Asked Questions
What law prohibits belligerents from using neutral territory?
Article 2 of the Hague Convention V states that belligerents are forbidden to move troops or convoys of munitions of war or supplies across the territory of a neutral Power, which includes its airspace.
What are ALKI lanes?
ALKI lanes are designated archipelagic sea lanes in Indonesia where aircraft and ships enjoy the right of transit passage under UNCLOS.
What is the danger of granting “blanket” overflight access?
Blanket access removes the predictability of military movements, giving a tactical advantage to the user. Legally, it could be seen as a violation of neutrality, potentially allowing opposing belligerents to intercept aircraft within Indonesian airspace.
How should a neutral nation balance strategic defense cooperation with its legal obligations to remain non-aligned during a conflict?
