leading marks
two or more seamarks to show direction of entry/exit by keeping in alignment
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.xyz
Programmatic citations — every numbered marker resolves to a verifiable graph row below.
Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.
4ort.xyz Knowledge Graph. (2026). leading marks. Retrieved May 7, 2026, from https://4ort.xyz/entity/leading-marks
“leading marks.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/leading-marks.
@misc{4ortxyz_leading-marks_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{leading marks}}, year = {2026}, url = {https://4ort.xyz/entity/leading-marks}, note = {Accessed: 2026-05-07}}
According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): leading marks — https://4ort.xyz/entity/leading-marks (retrieved 2026-05-07)
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