🗺️ Essential Markings on Nautical Voyage Charts for Safe Navigation (With Examples)

Even with modern ECDIS technology, accurate voyage chart markings remain a critical element of safe navigation and SOLAS-compliant passage planning.

Marking your charts, whether paper or ENC, isn’t just tradition; it’s smart seamanship backed by IMO Resolution A.893(21) and expected by Port State Control Officers and vetting inspectors.

This guide highlights the essential information every Second Officer must plot on voyage charts to improve safety, awareness, and operational readiness.

⚓ What Are Voyage Charts?

Voyage charts are navigational maps selected specifically for planning and executing a vessel’s route from port to port.

These may be paper charts or ENCs used in ECDIS, and form the basis for passage planning under SOLAS regulations.

Because nautical charts offer general geographic and hydrographic data, mariners must manually annotate them with voyage-specific information such as:

• No-go zones
• Waypoints
• Abort points
• Communication points
• Speed zones

👉 Tip: These annotations are part of a legally expected practice in the four stages of passage planning (APPRAISAL, PLANNING, EXECUTION, MONITORING).

⚠️ Why Marking Charts Is Still Necessary (Even With ECDIS)

Despite automation, the bridge team must continue manually plotting certain information.

It serves as a safety layer, a communication tool, and proof of due diligence during audits.

Here’s why voyage chart markings matter:

✅ 1. Enhanced Navigational Safety

Plotting hazards, no-go areas, and abort points helps avoid grounding and collisions especially in narrow or high-traffic zones.

✅ 2. Faster Decision-Making

Having speed limits, reporting points, and contingency anchors visible on the chart allows for quicker reactions during emergencies or course deviations.

✅ 3. Improved Situational Awareness

Different areas may have unique dangers.

Markings help the bridge team anticipate challenges such as strong currents, shallow patches, or dense traffic.

✅ 4. Clear Bridge Communication

Common markings include points to call the master, notify engine room, or prepare for SOx Emission Control Area (SECA) transitions.

📍 Example: A position marked: “Call Master before entering SECA”, helps reduce human error during environmental transitions.

✅ 5. Emergency Preparedness

Plotting abort points, emergency anchorages, and minimum UKC zones equips the bridge team to react effectively to failures or dangerous approaches.

✅ 6. Regulatory Compliance

Under IMO Resolution A.893(21) and vetting expectations, voyage charts should contain relevant and updated markings that reflect the planned route and vessel-specific needs.

📝 Note: Missing or incorrect markings are among the most common findings during SIRE vettings and PSC inspections.

📌 What Information Must Be Plotted on Voyage Charts?

Below is a structured list of critical information that must be clearly marked on navigational charts- whether on paper or ECDIS overlays, to support safe navigation, ensure compliance, and enhance bridge team situational awareness.

🧭 1. Position Fixing and Navigation Aids

These markings guide accurate positioning and improve monitoring during execution.

• Parallel Indexing (avoid using floating objects unless their position is verified)
• Position Fixing Methods (visual, radar, GPS) and frequency
• Prominent Radar Conspicuous Marks (e.g., islets, towers)
• Landfall Lights and Targets
• Clearing Lines and Bearings
• Transits and Leading Lines
• Heading Marks and Ranges
• Echo Sounder Activation Points
• Reporting Points (e.g., VTS calls, SECA entries)

🧑‍✈️ Bridge tip: Clearly label each reporting point using standardized symbols and include time or speed adjustments where necessary.

🛑 2. Safety Zones and Hazard Avoidance Areas

These indicate where the ship must not enter or where extreme caution is required.

• No-Go Areas (shallow waters, obstructions)
• Minimum Clearing Distances (around shoals, platforms)
• Safe Distance Off (from coastlines or navigational hazards)
• Anchor Clearance Zones
• Abort Points (with heading and contingency plan notes)

⚠️ Note: Excessive use of no-go markings can clutter the chart. Mark only critical areas to retain clarity.

🌊 3. Voyage Planning and Contingency Markings

These provide pre-emptive guidance for unusual situations or significant route details.

• Chart Change Points (paper or ENC transition)
• Significant Currents or Tides (include direction and estimated speed)
• Contingency Plans (emergency anchorages, alternative routes)
• Crossing Points in High-Density Traffic Areas

💡 Example:
“Crossing Traffic on both side!. Maintain VHF Ch. 16. Monitor both traffic lanes.”
Such notes reinforce planning intent and reduce ambiguity.

⚙️ 4. Machinery and Operational Considerations

These are vital for bridge-engine coordination and adapting machinery status along the route.

• Safe Speed Zones and expected speed alterations
• Change in Machinery Status (e.g., standby engine near port approach)
• Minimum UKC (Under Keel Clearance) requirements by segment
• Tug Engagement Areas (especially in ports requiring pilot-tug coordination)

🧑‍✈️ Who Ensures These Markings Are in Place?

The Second Officer (2/O) is directly responsible for plotting this information as part of the passage planning process.

However, the Master must carefully verify all markings to ensure:

• Compliance with SOLAS and company procedures
• Alignment with actual route and draft
• Clarity and legibility, especially during bridge watch handovers

🚨 Important: Incomplete or outdated chart markings can lead to vetting rejections, PSC deficiencies, or worse- navigational incidents.

❓ Frequently Asked Questions (FAQ)

✅ Is chart marking still required with ECDIS onboard?

Yes. Even with full ECDIS integration, manual or digital overlays must include annotations for no-go areas, abort points, and other voyage-specific details.

✅ Which IMO resolution governs voyage chart markings?

IMO Resolution A.893(21) outlines bridge procedures and encourages plotting key details that enhance safety and decision-making.

✅ What chart markings are checked during SIRE or PSC inspections?

Inspectors often look for:

• Abort points
• No-go areas
• Reporting points
• Master’s signature of review
• Proper symbols and notes per NP5011 or IEC 61174

⚓ Conclusion: Markings That Speak for Your Seamanship

Properly annotated voyage charts reflect not just compliance, but professional seamanship.

Every line drawn, note written, or symbol added enhances safety, teamwork, and confidence on the bridge.

🧭 Make it a habit: Mark the chart. Review with the master. Sail with confidence.

May the winds be in your favor.