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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
on sail
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on sail" is not correct in written English.
It is possible that the intended phrase was "on sale," which means that an item is available for purchase at a reduced price or a discount. Example: "The store has put all of its summer items on sale, so I bought a new swimsuit at a great price."
⚠ May contain grammatical issues
News & Media
Science
Wiki
Alternative expressions(5)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
22 human-written examples
To the Shores of Need Past the Reefs of Greed Through the Squalls of Hate Sail on, sail on, sail on, sail on.
News & Media
It is thanks to Prince Henry that the Portuguese explorers were under orders to "sail on, sail on".
News & Media
From the wells of disappointment where the women kneel to pray for the grace of God in the desert here and the desert far away: Democracy is coming to the U.S.A. Sail on, sail on O mighty Ship of State!
News & Media
It's coming like the tidal flood beneath the lunar sway, imperial, mysterious, in amorous array: Democracy is coming to the U.S.A. Sail on, sail on... I'm sentimental, if you know what I mean I love the country but I can't stand the scene.
News & Media
To better understand how it works, cruise ships are mostly planned before going on sail.
Wiki
To confirm that the activity observed against the AML cell lines was dependent on SAIL expression, knockdown experiments utilizing SAIL-specific short hairpin RNA constructs were performed in OCI-AML3 cells.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
38 human-written examples
Private lesson: one-on-one sailing on a Hobie Cat, $50 an hour.
News & Media
Soon she was filling the highly competitive slots on sail-training vessels.
News & Media
Mr. Stowe went on sailing alone.
News & Media
King wrote two volumes of autobiography and books on sailing.
News & Media
By Rebecca Mead July 27 , 2012Rebecca Mead on sailing in Weymouth.
News & Media
Expert writing Tips
Best practice
When describing a ship's movement, consider using "under sail" or "by sail" to correctly indicate the use of sails for propulsion. For continuing a voyage, use the phrasal verb "sailing on".
Common error
Avoid using "on sail" when you mean "under sail" or "by sail". "On sail" is rarely grammatically correct and may confuse your readers. "Under sail" properly describes that a ship is moved or powered by its sails.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on sail" functions as a prepositional phrase, but its grammatical correctness is questionable in modern English. Ludwig AI flags it as potentially incorrect. When encountered, it often appears in contexts where "under sail" or "by sail" would be more appropriate.
Frequent in
News & Media
40%
Wiki
30%
Science
30%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "on sail" is an uncommon and often incorrect expression in contemporary English. Ludwig AI identifies it as such, suggesting it might stem from a misunderstanding or misuse of similar nautical terms. More grammatically sound alternatives include "under sail" or "by sail" when describing a vessel propelled by its sails. While it appears in diverse contexts—primarily news, wiki, and scientific sources—its validity remains questionable. Therefore, writers should exercise caution and opt for more standard expressions to ensure clarity and grammatical accuracy. Stick to using more conventional and clearer alternatives to avoid confusion.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
under sail
Indicates that a vessel is powered by its sails; this alternative specifies the means of propulsion.
by sail
Similar to 'under sail', emphasizes the use of sails as the primary mode of propulsion.
sailing on
Expresses the action of continuing a voyage, focusing on the forward movement.
at sea
Refers to being on a voyage or out in the ocean, broadly indicating a state of travel by sea.
out to sea
Similar to 'at sea' but emphasizes the direction of travel away from land.
dependant on sails
Highlights the reliance on wind power, specifying that the vessel's movement is contingent on the sails.
powered by sail
Indicates that the vessel uses sail as its source of power; this emphasizes the method of propulsion.
voyaging
Highlights the act of undertaking a sea journey or voyage.
navigate
This relates to actively maneuver the vessel.
maritime
Related to navigation or commerce at sea.
FAQs
How can I correctly refer to a vessel propelled by sails?
Use the phrases "under sail" or "by sail" to accurately describe a vessel being propelled by sails. For example, "The ship was "under sail" as it crossed the Atlantic".
What's the difference between saying "on sail" and "sailing on"?
"On sail" is typically incorrect and not recognized in standard English. "Sailing on" means to continue a voyage or journey, as in "The ship is sailing on towards its destination".
When is it appropriate to use "on" with nautical terms?
Use "on" with nautical terms to indicate being aboard a vessel or referring to activities that happen on a ship. For example, "on board" or "life on a ship".
What are some alternatives to describe traveling by sea?
Consider using phrases like "at sea", "out to sea", or simply stating "traveling by ship" to describe sea travel.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested