Automatic Course Indicator
![Photograph taken from a book published by the Submarine Defense Association Photograph taken from a book published by the Submarine Defense Association](/content/history/nhhc/research/publications/documentary-histories/wwi/april-1918/illustrations/automatic-course-indicator/_jcr_content/mediaitem/image.img.jpg/1524511329761.jpg)
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Low (PNG, 319x319px, 127KB)
Med (JPEG, 1280x1280px, 199KB)
High Res (JPEG, 1932x2576px, 1MB)
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Document Type
- Photograph
Wars & Conflicts
- World War I 1917-1918
Navy Communities
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