Maritime Zone & Incident Stand-Off Analyzer

Model maritime stand-offs, supply vessel interdictions, and ramming incidents. Calculate Closest Point of Approach (CPA), evaluate COLREGs steering duties, determine kinetic collision momentum, and verify coastal state rights across territorial, contiguous, and exclusive economic zones.

Scenarios:

Vessel Alpha (Target / Resupply)

Fuel / Supply

Vessel Classification Speed over Ground (SOG) 11.5 kts True Course Heading (COG) 045° Distance from Littoral Baseline 115 NM Distance from Coastal State baseline (Palawan / Littoral mainland) Operational Status

Vessel Bravo (Intercepter)

Coast Guard

Intercepter Classification Speed over Ground (SOG) 19.0 kts True Course Heading (COG) 310° Hostile / Coercive Tactics

Drag vessels or trajectory vectors to adjust stand-off geometry

T-00:00 (Initial Observation) T+00:00 T+10:00 (Convergence)

Separation Distance

0.85 NM

Closest Approach (CPA)

0.02 NM

Time to CPA (TCPA)

01m 45s

Collision Risk

CRITICAL

Incident Legal Assessment

Illegal Interdiction

Violent Stand-off & High-Risk Ramming

Vessel Bravo executes aggressive bow-crossing and ramming against Vessel Alpha engaged in fuel replenishment inside Coastal State EEZ.

COLREGs (Collision Regs) Audit

UNCLOS Maritime Jurisdiction

UNCLOS Maritime Zones Explained

Territorial Sea (0–12 NM): Full coastal state sovereignty. Foreign vessels enjoy only the right of innocent passage without threatening peace or security.
Contiguous Zone (12–24 NM): Limited enforcement powers to prevent infringement of customs, fiscal, immigration, or sanitary laws.
Exclusive Economic Zone (EEZ, 0–200 NM): Coastal states possess sovereign rights to explore, exploit, conserve, and manage living/non-living natural resources. Other states retain freedoms of navigation and overflight, but cannot interfere with coastal state economic and sovereign operations.

COLREGs Steering & Sailing Rules

Rule 13 (Overtaking): Any vessel overtaking another must keep clear of the overtaken vessel until entirely past.
Rule 15 (Crossing): When two power-driven vessels cross with collision risk, the vessel with the other on its starboard side shall keep out of the way.
Rule 16/17 (Give-way vs. Stand-on): Stand-on vessel must maintain course and speed. Deliberately ramming or steering into another vessel's hull constitutes a severe breach of Rule 2 (Responsibility) and Rule 8 (Action to Avoid Collision).

Disputed Features & Resupply Missions

Under the 2016 Permanent Court of Arbitration South China Sea ruling, low-tide elevations (e.g. Mischief Reef, Second Thomas Shoal) within an EEZ form part of the coastal state's continental shelf and do not generate independent 12 NM territorial seas. Interdicting or ramming fuel replenishment missions to established posts violates coastal sovereign prerogatives under UNCLOS Article 56.