biển ngắm
Definition
- Noun:
- A sighting board or target board: A board or panel, often marked with specific patterns, lines, or colors, used as a visual reference point for aiming, alignment, or measurement in technical fields such as surveying, construction, or engineering.
- A sight or aiming mark: A clearly visible object or marker used to establish a line of sight for observation, targeting, or calibration.
Usage Examples
- Noun:
- Kỹ sư dùng biển ngắm để căn chỉnh hướng của con đường mới. (The engineer used a sighting board to align the direction of the new road.)
- Trong trắc địa, biển ngắm là công cụ hỗ trợ đo đạc chính xác. (In surveying, a target board is a tool that aids in precise measurement.)
Advanced Usage
- Technical Context: Primarily used in professional, technical jargon rather than in everyday conversation. It refers to the physical instrument itself.
- Việc lắp đặt biển ngắm đúng vị trí là bước quan trọng đầu tiên. (Installing the sighting mark in the correct position is the crucial first step.)
Variants and Related Words
- Mốc ngắm (n): A survey marker or benchmark; a fixed point used for sighting.
- Tiêu ngắm (n): A sighting target or reticle (often used in optical devices like scopes).
Synonyms
- Bảng ngắm: Sighting/target board.
- Mốc chuẩn: Benchmark, reference point.
Related Phrases
- Cắm biển ngắm: To set up/plant a sighting board.
- Đội khảo sát đang cắm biển ngắm dọc theo tuyến đường. (The survey team is setting up sighting boards along the route.)
- Ngắm theo biển: To aim/sight using the board.
- Anh ta phải ngắm theo biển để điều chỉnh máy kinh vĩ. (He had to sight using the board to adjust the theodolite.)
Related Idioms
(This is a highly technical term with no common idiomatic expressions in general usage.)