cột ngắm
Definition
- Noun:
- Sighting post, aiming post: A vertical rod or stake used as a fixed reference point for aiming or aligning, often in surveying, construction, or military contexts. It serves as a visual guide to establish a line of sight.
- Surveyor's rod, ranging rod: A rod, often painted with alternating colors, used by surveyors to mark points and to sight lines for measurement.
Usage Examples
- Noun:
- Người trắc địa cắm một cột ngắm để xác định đường thẳng. (The surveyor placed a sighting post to determine the straight line.)
- Trong quân sự, cột ngắm giúp xạ thủ ngắm bắn chính xác hơn. (In the military, an aiming post helps the shooter aim more accurately.)
Advanced Usage
- "cắm cột ngắm": to set up/place a sighting post.
- Trước khi đo đạc, chúng tôi phải cắm các cột ngắm dọc theo tuyến đường. (Before measuring, we must set up sighting posts along the route.)
Variants and Related Words
- Tiêu ngắm (n): A synonym often used interchangeably, meaning a sighting target or marker.
- Jalon (n): A French loanword used in technical Vietnamese, specifically meaning a surveyor's pole or ranging rod.
Synonyms
- Cọc tiêu: Stake, marker.
- Mốc ngắm: Aiming mark, benchmark.
Related Phrases
- Đường ngắm: Line of sight.
- Cần giữ cho đường ngắm đi qua hai cột ngắm. (The line of sight must pass through the two aiming posts.)