Maritime Boundaries and Law of the Sea

Active learning helps students grasp maritime boundaries because the rules are abstract until they see them drawn on a map or negotiate them in role-play. When students plot zones or simulate disputes, the concrete becomes clear, which is essential for a topic where boundaries are invisible and rules rely on precise legal definitions.

• Grade 10
• Geography
• 4 activities
• 40 min–60 min

Learning Objectives

1. Differentiate between territorial seas, contiguous zones, and exclusive economic zones (EEZs) based on their defined nautical mile limits and associated coastal state rights.
2. Analyze the geographic factors, such as island location and continental shelf shape, that contribute to disputes over maritime boundaries and ocean resources.
3. Evaluate the effectiveness of the United Nations Convention on the Law of the Sea (UNCLOS) in resolving international maritime boundary disputes and managing shared ocean resources.
4. Compare the legal implications and resource rights associated with different types of maritime boundaries, including internal waters, territorial seas, and EEZs.

Case Study Analysis

⏱ 45 min·Small Groups

Mapping Activity: Plotting EEZs

Distribute world outline maps marked with coastal nations. Students measure and draw territorial seas, EEZs, and potential overlaps using string or rulers for scale. Groups compare maps and note dispute hotspots like the East China Sea.

Prepare & details

Differentiate between various types of maritime boundaries and their legal implications.

Facilitation Tip: During the Mapping Activity, provide real-world coastlines with irregular shapes so students practice adjusting equidistance lines based on natural features.

Setup: Groups at tables with case materials

Materials: Case study packet (3-5 pages), Analysis framework worksheet, Presentation template

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Simulation Game

⏱ 60 min·Small Groups

Simulation Game: Boundary Negotiation

Assign groups roles as nations in a dispute, such as Canada versus Denmark over Hans Island waters. Provide UNCLOS excerpts; groups propose solutions, then rotate to debate and vote on equitable boundaries.

Prepare & details

Analyze the geographic factors that lead to disputes over ocean resources.

Facilitation Tip: In the Boundary Negotiation Simulation, assign roles with distinct interests (e.g., a fishing state vs. a seabed mining state) to force trade-offs and expose enforcement realities.

Setup: Flexible space for group stations

Materials: Role cards with goals/resources, Game currency or tokens, Round tracker

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Jigsaw

⏱ 50 min·Small Groups

Jigsaw: Dispute Analysis

Divide class into expert groups on specific cases (Arctic, Spratly Islands). Each researches geographic factors and UNCLOS applications, then reforms into mixed groups to teach and evaluate resolution effectiveness.

Prepare & details

Evaluate the effectiveness of the Law of the Sea in managing global ocean governance.

Facilitation Tip: For the Case Study Jigsaw, assign each group a different dispute so they present varied perspectives and collectively build a fuller understanding of UNCLOS’ strengths and gaps.

Setup: Flexible seating for regrouping

Materials: Expert group reading packets, Note-taking template, Summary graphic organizer

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Case Study Analysis

⏱ 40 min·Whole Class

Whole Class Debate: UNCLOS Effectiveness

Split class into proponents and critics of UNCLOS. Provide evidence packets on successes and failures; teams prepare 3-minute arguments, followed by moderated debate and class vote.

Prepare & details

Differentiate between various types of maritime boundaries and their legal implications.

Facilitation Tip: During the Whole Class Debate, require students to cite specific UNCLOS articles to ground their arguments in legal text rather than opinion.

Setup: Groups at tables with case materials

Materials: Case study packet (3-5 pages), Analysis framework worksheet, Presentation template

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Teaching This Topic

Experienced teachers begin with mapping to make the invisible visible, then layer in simulations to reveal how rules collide with real-world interests. Avoid starting with the text of UNCLOS itself, as the legal language can overwhelm before students see its purpose. Research shows that role-playing boundary negotiations builds empathy for conflicting state interests, which deepens comprehension of why disputes persist despite clear rules.

What to Expect

Successful learning looks like students accurately labeling maritime zones on maps, negotiating boundaries with evidence from UNCLOS, and analyzing disputes by identifying the relevant legal principles. They should explain why certain boundaries shift due to geography and how resource rights differ by zone.

Watch Out for These Misconceptions

Common Misconception

During Mapping Activity: Plotting EEZs, watch for students who label the entire 200-nautical-mile area as fully sovereign.

What to Teach Instead

Pause the mapping exercise and ask students to annotate their maps with legal terms: note where innocent passage applies, where high seas freedoms remain, and why resource rights do not equal territorial control.

Common Misconception

During Mapping Activity: Plotting EEZs, watch for students who draw straight lines ignoring coastal geography.

What to Teach Instead

Have students compare their maps in pairs and identify where concave coasts or islands caused their equidistance line to bend, then revise their drawings together using UNCLOS Article 15 as a guide.

Common Misconception

During Whole Class Debate: UNCLOS Effectiveness, watch for students who assume all disputes are resolved by the treaty’s mechanisms.

What to Teach Instead

Prompt students to check the list of UNCLOS signatories during the debate and ask how non-signatory states, like the US, complicate enforcement—then revisit their debate points with this reality in mind.

Assessment Ideas

Exit Ticket

After Mapping Activity: Plotting EEZs, collect student maps and ask them to write one sentence each explaining the rights granted in the territorial sea and one sentence for rights in the EEZ, using their labeled zones as evidence.

Quick Check

After Simulation: Boundary Negotiation, present a new dispute scenario and ask students to identify which maritime boundary type is most relevant and why, referencing the legal principles they applied during the simulation.

Discussion Prompt

During Whole Class Debate: UNCLOS Effectiveness, circulate and listen for students who cite specific UNCLOS articles or real cases (e.g., South China Sea) to support their arguments about the treaty’s success or limitations.

Extensions & Scaffolding

• Challenge students to propose a new maritime boundary rule that would reduce disputes, citing flaws in UNCLOS Article 15 and testing their rule with a second mapping exercise.
• Scaffolding: Provide a simplified map with pre-labeled points where students only need to connect the dots to draw boundaries, then gradually remove labels in later rounds.
• Deeper exploration: Have students research how rising sea levels might shift baselines and redraw maritime zones, connecting climate change to legal geography.

Key Vocabulary

Territorial Sea	A belt of coastal waters extending up to 12 nautical miles from the baseline of a coastal state, over which the state has sovereignty.
Exclusive Economic Zone (EEZ)	An area extending 200 nautical miles from the baseline, in which a coastal state has sovereign rights for exploring, exploiting, conserving, and managing natural resources, both living and non-living.
Baseline	The line along the coast chosen as the starting point for measuring the seaward limits of territorial waters and other maritime zones.
UNCLOS	The United Nations Convention on the Law of the Sea, an international agreement that establishes a framework for maritime law, including boundary definitions and resource rights.
Continental Shelf	The submerged part of a continent that extends from the coastline into the ocean, which can extend beyond the 200-nautical-mile EEZ limit for resource rights.