Sailing Signal Flag Echo (E) – Altering Course or Adding a Mark
Echo (E) is a square flag divided horizontally: blue over red.
Context matters with the E Flag.
- Under International Code of Signals (ICS): It means “I am altering my course to starboard.”
- Under Racing Rules of Sailing (RRS): It indicates an additional mark has been placed on the course (as defined by the Regatta’s Sailing Instructions).
Echo communicates intent within the rule system governing the situation.
1) Physical Description
Shape:
Square signal flag.
Pattern:
Horizontally divided into two equal bands.
Orientation:
- Top half: Blue
- Bottom half: Red
There are no symbols, letters, or emblems. The division is a clean horizontal line across the center.
When hoisted correctly:
- Blue must be on top.
- Red must be on bottom.
- The flag must fly clear and not be inverted.
Visibility Considerations:
The strong contrast between blue and red provides good daylight visibility. Proper size selection relative to vessel size and viewing distance is necessary for recognition.
Similar Flags – No Confusion Confirmed:
Echo is not swallow-tailed.
Echo is not vertically divided.
No other International Code of Signals (ICS) flag shares this exact horizontal blue-over-red configuration.
2) Color Specification
ICS publications specify color names (e.g., “blue,” “red”) but do not publish official digital hex codes. The following are widely accepted maritime approximations for digital and print consistency:
| Color | Maritime Name | Approximate Hex Code |
|---|---|---|
| Blue | Signal Blue | #003F87 |
| Red | Signal Red | #C8102E |
Hex values are approximations for digital media only. Fabric flags may vary slightly depending on manufacturer and dye standards.
3) Official International Code of Signals (ICS) Meaning
ICS Meaning (Single-letter signal):
“I am altering my course to starboard.”
Plain-Language Explanation:
A vessel displaying Echo is communicating that it is turning to the right (starboard).
Operational Context:
Echo is a maneuvering signal used to indicate navigational intent to nearby vessels. It supplements, but does not replace, required sound signals under COLREG Rule 34 when applicable.
Echo communicates intent. It does not assign right-of-way.
4) Boundary Statements
What Echo Does NOT Mean
Echo does not:
- Indicate distress.
- Signal a request for assistance.
- Grant right-of-way.
- Override traffic separation schemes.
- Replace required navigation lights or sound signals.
- Automatically signal a race course change.
What Echo Does NOT Authorize
Echo does not authorize:
- Violation of COLREGs.
- Failure to maintain proper lookout.
- Unsafe maneuvering.
- Deviation from published Sailing Instructions in a regatta.
Rule System Separation
- ICS Meaning: “I am altering my course to starboard.”
- COLREGs: Govern right-of-way and maneuvering obligations. Echo does not supersede COLREG rules.
- Racing Rules of Sailing (RRS): May assign a different meaning when displayed by a race committee vessel.
These systems are independent. Meaning depends on context and governing authority.
5) Commercial Sailing Use
In commercial navigation, Echo may be used to visually indicate a starboard alteration in:
- Harbor approaches
- Inland waterways
- Traffic separation zones
- Restricted visibility (in combination with sound signals)
Liability and Rule Hierarchy
Displaying Echo:
- Does not shift collision liability.
- Does not relieve the vessel from complying with COLREG Rules 8, 9, 14, 15, 16, or 17.
- Does not replace required whistle signals under Rule 34.
Echo is informational only. Safe navigation responsibility remains with the vessel operator.
6) Racing and Regatta Management Use
Does Echo Have an RRS Meaning?
Yes.
Under the Racing Rules of Sailing (RRS), when displayed by the race committee, Echo commonly means:
An additional mark has been placed on the course.
This meaning is separate from the ICS maneuvering signal.
Clear Distinction
- ICS (Navigation): Altering course to starboard.
- RRS (Race Management): An additional mark has been added to the course.
The Sailing Instructions (SI) govern how Echo is used in a specific event. Competitors must follow the SI and RRS.
Echo displayed by a race committee vessel during a regatta is interpreted under RRS, not ICS.
7) Informal or Local Uses (Non-Standard)
Some local fleets may:
- Refer to Echo as the “extra mark flag.”
- Use it in training scenarios to simulate race management adjustments.
These uses are non-standard and derive authority only from the organizing authority’s Sailing Instructions.
No widely recognized non-standard commercial meanings exist.
8) Real-World Commercial Scenario
A commercial vessel is navigating a congested harbor channel. A crossing vessel is approaching from port. The master intends to alter course to starboard to align with the channel and increase passing distance.
Echo is hoisted as the vessel begins the maneuver, supplementing the required whistle signal.
The display communicates intent but does not alter right-of-way obligations under COLREG Rule 15.
9) Real-World Regatta Scenario
During a windward-leeward race, the race committee determines that an additional offset mark is required to improve fleet flow at the weather mark.
The committee boat displays Echo in accordance with the Sailing Instructions.
Competitors understand that an extra mark has been added to the course and round it as required.
In this context, Echo has no ICS maneuvering meaning. It functions solely as a race management signal under RRS and the event’s Sailing Instructions.
10) Concise Summary
Echo (E) is a square flag divided horizontally: blue over red.
- Under ICS: It means “I am altering my course to starboard.”
- Under RRS: It indicates that an additional mark has been placed on the course (as defined by Sailing Instructions).
Echo communicates intent within the rule system governing the situation.
Authority comes from context and rule hierarchy, not assumption.
About This Project
This series, The Sailing Flags, is designed to explore the full range of maritime flags used in commercial operations and racing, from Alpha to Zulu. Each article focuses on one flag, its official meaning, real-world usage, and practical examples, providing a clear resource for sailors, race committees, and maritime professionals.
I am also using this project as a personal learning journey. Each day, I explore different presentation and storytelling techniques with the help of AI tools, from writing and research to visuals and video production, programing, sound generation, along with data collection & assembly.
My goal is to learn how to communicate complex maritime information effectively while experimenting with new creative tools.
About Keith
Keith Harper is a recreational sailor primarily sailing out of Privateer Yacht Club near Chattanooga, Tennessee. His love of sailing began in 2011 with sailing lessons through Privateer’s Adult Learn-To-Sail program using Flying Scots as a training boat. He quickly advanced to club racing, Regattas, and eventually open ocean sailing as delivery crew on vessels as large as 137′ traveling between Newport R.I., Bermuda, and Tortola BVI.
Keith has served on countless race committees in positions ranging from Safety Boat through PRO.
This Sailing Flag Project is his way of giving back to the sailing community.
Disclaimer
This article is provided for educational and informational purposes only. While every effort has been made to ensure accuracy, sailors should always consult the International Regulations for Preventing Collisions at Sea (COLREGS), the International Code of Signals, the Racing Rules of Sailing, and the applicable Sailing Instructions issued by the organizing authority or race committee.
In the event of any discrepancy, the official rules and instructions in force at the time shall take precedence.
Code Flag Delta (D): “Keep Clear of Me” or “Do Not Leave Harbor”
Concise Summary
Delta (D) is a swallow-tailed flag with horizontal yellow–blue–yellow stripes.
- Under ICS: “Keep clear of me; I am maneuvering with difficulty.”
- Under RRS: A harbor control signal governing when boats may leave.
Delta communicates differently depending on rule system and context.
Authority derives from rule hierarchy, not assumption.
1) Physical Description
Shape:
Swallow-tailed (triangular forked fly). Delta is one of the ICS flags that is not square.
Pattern:
Three horizontal stripes of equal height.
Orientation:
From top to bottom:
- Top stripe: Yellow
- Middle stripe: Blue
- Bottom stripe: Yellow
The fly end is split (swallow-tailed). The horizontal stripes run parallel to the top edge of the flag.
When properly hoisted:
- Yellow must be on top.
- Blue must be centered.
- Yellow must be on bottom.
- The swallowtail must be at the fly end, not at the hoist.
Visibility Considerations:
The alternating yellow–blue–yellow pattern provides strong daylight contrast. The swallowtail shape aids recognition at distance. Proper halyard tension is required to prevent wrapping, which could obscure stripe order.
Similar Flags – No Confusion Confirmed:
- Not square.
- Not vertically striped.
- No other ICS flag combines horizontal yellow–blue–yellow stripes with a swallowtail profile.
2) Color Specification
ICS specifies color names but does not publish digital color codes. The following are standard maritime approximations for digital use:
| Color | Maritime Name | Approximate Hex Code |
|---|---|---|
| Yellow | Signal Yellow | #FFD100 |
| Blue | Signal Blue | #003F87 |
Hex values are approximations for digital and print consistency only. Fabric flags may vary by manufacturer.
3) Official International Code of Signals (ICS) Meaning
ICS Meaning (Single-letter signal):
“Keep clear of me; I am maneuvering with difficulty.”
Plain-Language Explanation:
A vessel displaying Delta is informing other vessels that it requires sea room because it is constrained in its ability to maneuver normally.
Operational Context:
Delta may be used in situations such as:
- Replenishment at sea
- Towing operations
- Dredging
- Cable laying
- Complex maneuvering evolutions
Delta communicates a request for other vessels to maintain distance.
4) Boundary Statements
What Delta Does NOT Mean
Delta does not:
- Declare distress.
- Automatically establish a “vessel restricted in ability to maneuver” status under COLREG Rule 3(g).
- Replace required day shapes or lights prescribed by COLREGs.
- Grant automatic right-of-way.
What Delta Does NOT Authorize
Delta does not authorize:
- Ignoring COLREGs.
- Disregarding traffic separation schemes.
- Failing to display required shapes or lights.
- Unsafe operation.
Rule System Separation
- ICS Meaning: “Keep clear of me; I am maneuvering with difficulty.”
- COLREGs: Define legal status (e.g., “restricted in ability to maneuver”) and corresponding light/day-shape requirements.
- Racing Rules of Sailing (RRS): Govern competitive sailing events and may assign separate race-related meanings.
ICS signaling does not replace statutory navigation requirements under COLREGs.
5) Commercial Sailing Use
Practical Applications
Delta may be displayed during:
- Towing operations where the tow restricts maneuverability.
- Underway replenishment between naval vessels.
- Dredging or survey work.
- Subsea cable operations.
- Vessel transfers or pilot embarkation in constrained areas (use depends on operator practice; not mandated in all cases).
Liability and Rule Hierarchy Considerations
Displaying Delta:
- Does not legally redefine vessel status under COLREGs.
- Does not substitute required shapes (e.g., ball–diamond–ball for RAM vessels).
- Does not eliminate collision avoidance responsibilities.
The master remains responsible for compliance with:
- COLREG Rules 5–19
- Applicable local navigation laws
- Safe seamanship standards
Delta is advisory. It is not self-executing authority.
6) Racing and Regatta Management Use
Does Delta Have an RRS Meaning?
Yes.
Under the Racing Rules of Sailing (RRS), Flag D has a race-specific meaning when displayed by the race committee.
Common RRS meaning:
Boats shall not leave the harbor until this signal is made.
The warning signal will be made not less than a specified time after Flag D is displayed.
Exact wording and timing are governed by the Notice of Race (NOR) and Sailing Instructions (SI).
Clear Distinction
- ICS (Navigation): “Keep clear of me; I am maneuvering with difficulty.”
- RRS (Race Management): Harbor departure control signal.
These meanings are entirely separate and context-dependent.
A race committee vessel displaying Delta during pre-race harbor control is operating under RRS authority, not ICS.
7) Informal or Local Uses (Non-Standard)
Some clubs may:
- Use Delta informally to signal “mark boat at work.”
- Use it during training events to signal restricted maneuvering.
Such uses are non-standard and derive authority only from event-specific Sailing Instructions.
There is no widely recognized alternative commercial meaning beyond ICS.
8) Real-World Commercial Scenario
A dredging vessel is operating in a narrow channel while deploying suction equipment.
The vessel displays Delta to signal to approaching traffic that it is maneuvering with difficulty and requires clearance.
The vessel also displays the required day shapes and lights under COLREG Rule 27.
Delta supplements — it does not replace — statutory signals.
9) Real-World Regatta Scenario
Before the start of racing, the race committee displays Flag D at the harbor exit.
The Sailing Instructions state:
Boats shall not leave the harbor until Flag D is displayed. The warning signal will be made no earlier than 45 minutes after Flag D is displayed.
Competitors wait for Delta before departing the harbor.
In this context, Delta has no ICS maneuvering meaning. It functions solely as a race management signal under RRS.
About This Project
This series, The Sailing Flags, is designed to explore the full range of maritime flags used in commercial operations and racing, from Alpha to Zulu. Each article focuses on one flag, its official meaning, real-world usage, and practical examples, providing a clear resource for sailors, race committees, and maritime professionals.
I am also using this project as a personal learning journey. Each day, I explore different presentation and storytelling techniques with the help of AI tools, from writing and research to visuals and video production, programing, sound generation, along with data collection & assembly.
My goal is to learn how to communicate complex maritime information effectively while experimenting with new creative tools.
About Keith
Keith Harper is a recreational sailor primarily sailing out of Privateer Yacht Club near Chattanooga, Tennessee. His love of sailing began in 2011 with sailing lessons through Privateer’s Adult Learn-To-Sail program using Flying Scots as a training boat. He quickly advanced to club racing, Regattas, and eventually open ocean sailing as delivery crew on vessels as large as 137′ traveling between Newport R.I., Bermuda, and Tortola BVI.
Keith has served on countless race committees in positions ranging from Safety Boat through PRO.
This Sailing Flag Project is his way of giving back to the sailing community.
Disclaimer
This article is provided for educational and informational purposes only. While every effort has been made to ensure accuracy, sailors should always consult the International Regulations for Preventing Collisions at Sea (COLREGS), the International Code of Signals, the Racing Rules of Sailing, and the applicable Sailing Instructions issued by the organizing authority or race committee.
In the event of any discrepancy, the official rules and instructions in force at the time shall take precedence.
Code Flag Charlie (C): “Yes / Affirmative”
Physical Description
The Charlie flag is a rectangular flag with five horizontal stripes, arranged:
Blue – White – Red – White – Blue
All stripes are of equal height and run the full width of the flag. Charlie is not swallow-tailed. Orientation matters only in keeping the stripes horizontal; flown vertically, the color order must remain correct from top to bottom.
The strong color contrast makes Charlie highly legible at distance and in poor visibility, especially when flown alone.
Color Specification (Maritime & Digital Reference)
| Stripe | Color | Common Hex Code | Notes |
|---|---|---|---|
| Top | Blue | #003A8F | Deep signal blue |
| 2nd | White | #FFFFFF | Pure white |
| Middle | Red | #C8102E | Signal red |
| 4th | White | #FFFFFF | Pure white |
| Bottom | Blue | #003A8F | Matches top stripe |
Visual guidance
- Use flat, saturated colors
- Avoid gradients or shading
- Maintain equal stripe proportions
- Charlie Flag consists of five equal horizontal stripes
Official Meaning (International Code of Signals)
Under the International Code of Signals, Charlie means:
“Yes”
or
“Affirmative.”
This is a reply signal. Charlie does not initiate action, give permission, or convey instruction on its own. It confirms a message that has already been sent.
Boundary Statement
Charlie has no standalone meaning. It only responds to a prior signal or question.
Commercial Sailing Use
In commercial operations, Charlie is used primarily for acknowledgment:
- Confirming receipt of a maneuver request
- Affirming readiness after a procedural signal
- Responding to a question posed via flags, lights, or radio
Charlie does not:
- Authorize passage
- Grant clearance
- Replace radio or written instructions
Those functions remain governed by COLREGs, port rules, and vessel traffic services.
Racing & Regatta Management Use
In racing, Flag C has a specific procedural meaning, distinct from its International Code usage.
When displayed by the race committee, Charlie means:
“The course has been changed.”
The new direction is indicated by:
- The compass bearing on the flag
- Or the orientation of a mark
This signal is typically accompanied by repetitive sound signals.
Boundary Statement
In racing, Charlie only has this meaning when displayed by the race committee and defined in the Racing Rules of Sailing.
Competitors should not interpret Charlie flown by other vessels as a course signal.
Informal or Local Use
Charlie is sometimes used informally to mean:
- “Acknowledged”
- “Understood”
- “Confirmed”
These uses are acceptable only in non-regulated, clearly defined contexts and should never replace official procedures in commercial or competitive environments.
Real-World Examples
Commercial Example
A pilot boat signals a vessel requesting confirmation of readiness to receive a pilot. The vessel hoists Charlie, affirming readiness without further instruction.
Regatta Example
During a race, the committee displays Charlie with repeated sound signals and a directional indicator, notifying the fleet of a change in course at the next mark.
Summary
The Charlie flag is simple, powerful, and often misunderstood. Officially, it means “Yes”, nothing more. In racing, it takes on a tightly defined procedural role when displayed by the race committee. Its authority comes not from the flag itself, but from context, origin, and prior communication.
About This Project
This series, The Sailing Flags, is designed to explore the full range of maritime flags used in commercial operations and racing, from Alpha to Zulu. Each article focuses on one flag, its official meaning, real-world usage, and practical examples, providing a clear resource for sailors, race committees, and maritime professionals.
I am also using this project as a personal learning journey. Each day, I explore different presentation and storytelling techniques with the help of AI tools, from writing and research to visuals and video production, programing, sound generation, along with data collection & assembly.
My goal is to learn how to communicate complex maritime information effectively while experimenting with new creative tools.
About Keith
Keith Harper is a recreational sailor primarily sailing out of Privateer Yacht Club near Chattanooga, Tennessee. His love of sailing began in 2011 with sailing lessons through Privateer’s Adult Learn-To-Sail program using Flying Scots as a training boat. He quickly advanced to club racing, Regattas, and eventually open ocean sailing as delivery crew on vessels as large as 137′ traveling between Newport R.I., Bermuda, and Tortola BVI.
Keith has served on countless race committees in positions ranging from Safety Boat through PRO.
This Sailing Flag Project is his way of giving back to the sailing community.
Disclaimer
This article is provided for educational and informational purposes only. While every effort has been made to ensure accuracy, sailors should always consult the International Regulations for Preventing Collisions at Sea (COLREGS), the International Code of Signals, the Racing Rules of Sailing, and the applicable Sailing Instructions issued by the organizing authority or race committee.
In the event of any discrepancy, the official rules and instructions in force at the time shall take precedence.
Code Flag Bravo (B): “I Am Carrying Dangerous Cargo”
Physical Description
The Bravo flag is a solid red swallow-tailed flag. It contains no symbols, stripes, or divisions, just a single field of red. The swallow-tail cut at the fly end is a defining feature and helps distinguish Bravo from non-standard red banners or decorative flags.
When properly displayed, the flag is immediately recognizable by both its shape and color, even in rough seas or reduced visibility. A rectangular red flag is not technically correct for Bravo.
Color Specification (Standard & Digital Reference)
| Element | Color | Hex Code | Notes |
|---|---|---|---|
| Field | Red | #C8102E (ISO red) / #D00000 (common digital equivalent) | Should be vivid, not dark or maroon |
Visual guidance
- Red must appear bright and saturated
- No gradients, textures, or patterns
- The swallow-tail shape must remain clearly visible when flying
Official Meaning
Under the International Code of Signals, Bravo means:
“I am carrying, discharging, or transporting dangerous goods.”
In practical terms, Bravo warns other vessels and shore facilities that hazardous cargo is present. This includes flammable, explosive, toxic, or otherwise regulated materials.
Bravo does not specify the type of hazard, only that caution is required.
Commercial Sailing Use
In commercial operations, Bravo is most commonly seen on:
- Tankers carrying fuel or chemicals
- Cargo vessels loading or unloading dangerous goods
- Vessels engaged in fuel transfer operations
When Bravo is flown, other vessels should:
- Maintain a safe distance
- Avoid actions that could create sparks, wake, or interference
- Follow port authority or harbor master instructions
Failure to properly display Bravo when required can carry regulatory and liability consequences.
Racing & Regatta Context
Bravo is not a racing signal and has no tactical or procedural meaning under the Racing Rules of Sailing.
However, race committees and event organizers may encounter Bravo in the following situations:
- A support or committee vessel conducting fuel transfers
- A nearby commercial vessel operating within the race area
- Harbor or port operations adjacent to a regatta venue
In these cases, Bravo serves as a safety awareness signal, not a race management instruction. Race officers should treat it as an environmental factor, similar to restricted navigation zones or commercial traffic.
Informal Regatta Use: Fleet Identification
Although Bravo has no official meaning under the Racing Rules of Sailing, some regattas use the flag informally to distinguish between fleets. Most commonly B Fleet in multi-fleet events are signified with a Bravo Flag.
When used this way:
- The practice is defined explicitly in the Sailing Instructions
- Bravo is flown on the race committee vessel or signal boat
- The flag serves as a visual identifier, not a race signal
This usage is local and procedural, not tactical. Its meaning exists only because it is clearly stated in the event documentation.
Important Note for Competitors and Officials
If Bravo is used for fleet identification:
- It must be defined in the Sailing Instructions
- It does not replace standard class flags or warning signals
- It carries no safety or hazardous cargo meaning in this context
Absent written instruction, Bravo should always be interpreted according to the International Code of Signals.
Real-World Examples
Commercial Example
A fuel barge alongside a dock displays Bravo while transferring diesel. Passing traffic reduces speed and keeps clear until operations are complete.
Regatta Example
A race committee boat fueling between race days flies Bravo. Competitors are advised to keep clear, though racing schedules and signals remain unchanged.
Summary
The Bravo flag is simple by design and serious in meaning. A solid red swallow-tailed flag, it signals the presence of dangerous cargo and calls for heightened caution from nearby vessels. While it plays no role in race signaling, Bravo remains highly relevant to race officials operating in shared or commercial waters.
Correct display, recognition, and respect for Bravo are essential components of safe seamanship.
About This Project
This series, The Sailing Flags, is designed to explore the full range of maritime flags used in commercial operations and racing, from Alpha to Zulu. Each article focuses on one flag, its official meaning, real-world usage, and practical examples, providing a clear resource for sailors, race committees, and maritime professionals.
I am also using this project as a personal learning journey. Each day, I explore different presentation and storytelling techniques with the help of AI tools, from writing and research to visuals and video production, programing, sound generation, along with data collection & assembly.
My goal is to learn how to communicate complex maritime information effectively while experimenting with new creative tools.
About Keith
Keith Harper is a recreational sailor primarily sailing out of Privateer Yacht Club near Chattanooga, Tennessee. His love of sailing began in 2011 with sailing lessons through Privateer’s Adult Learn-To-Sail program using Flying Scots as a training boat. He quickly advanced to club racing, Regattas, and eventually open ocean sailing as delivery crew on vessels as large as 137′ traveling between Newport R.I., Bermuda, and Tortola BVI.
Keith has served on countless race committees in positions ranging from Safety Boat through PRO.
This Sailing Flag Project is his way of giving back to the sailing community.
Disclaimer
This article is provided for educational and informational purposes only. While every effort has been made to ensure accuracy, sailors should always consult the International Regulations for Preventing Collisions at Sea (COLREGS), the International Code of Signals, the Racing Rules of Sailing, and the applicable Sailing Instructions issued by the organizing authority or race committee.
In the event of any discrepancy, the official rules and instructions in force at the time shall take precedence.