freeboard
freeboard — 名詞
1. The distance from the waterline to a vessel's main deck — or, on a small boat, t
乾舷
船隻水線至甲板的垂直安全距離
The distance from the waterline to a vessel's main deck — or, on a small boat, to the gunwale. This height acts as a safety margin, preventing waves from washing over the side.
Pim checked the freeboard against the loading chart as the crew secured the last steel beam.
船員固定最後一根鋼樑時，Pim 對照裝載表檢查了乾舷高度。
collocation: check the freeboard
The old fishing boat had so little freeboard that every wave wet the deck.
那艘老漁船的乾舷太低，每個浪頭打來都把甲板弄濕了。
pattern: so little freeboard that...
Esteban measured the freeboard at the bow, where the water sat highest.
Esteban 測量了船頭的乾舷，那裡的水位最高。
The cruise liner's generous freeboard kept the lower cabins dry during the storm.
郵輪充足的乾舷讓下層船艙在暴風雨中保持乾燥。
collocation: generous freeboard
Mei watched the freeboard shrink as the crew loaded more containers onto the ship.
Mei 看著乾舷隨著船員裝載更多貨櫃而逐漸縮小。
- minimum freeboard
- generous freeboard
- insufficient freeboard
- measure the freeboard
- check the freeboard
- clearance
more general; can refer to any gap between two surfaces, not specifically maritime
- deck height
less technical term used in casual boating contexts, though less precise than freeboard
用法筆記
Used almost exclusively in maritime and naval contexts. When referring to small boats, freeboard is measured to the gunwale (the upper edge of the side), not to a deck.
常見錯誤
2. In structures built to hold back water — such as dams, levees, or flood walls —
出水高
水壩等高於已知最高水位的預留高度
In structures built to hold back water — such as dams, levees, or flood walls — the extra height added above the highest known water level. This margin ensures that waves or unexpected surges do not spill over the top.
Hugo designed the dam with two metres of freeboard above the highest flood level.
Hugo 設計水壩時，在最高洪水位之上預留了兩公尺的出水高。
collocation: designed... with... freeboard
Engineers raised the reservoir wall by half a metre to add freeboard after new flood maps showed a higher risk.
新的洪水地圖顯示風險更高後，工程師將水庫壩體加高了半公尺以增加出水高。
collocation: raised... to add freeboard
Sahil measured the freeboard on the levee before the monsoon rains arrived.
Sahil 在季風降雨來臨前測量了堤防的出水高。
The flood barrier's freeboard proved just enough when the river rose two metres overnight.
防洪牆的出水高剛好足夠，擋住了那一夜暴漲兩公尺的河水。
collocation: adequate freeboard
Tamar measured the dam's freeboard at three point two metres — well above the national safety minimum.
Tamar 測得水壩的出水高為三點二公尺，遠高於國家安全標準的最低要求。
- design freeboard
- required freeboard
- adequate freeboard
- freeboard allowance
- increase the freeboard
- overflow margin
used in some engineering documents but less common than freeboard in everyday practice
- safety height
broader term found in general safety regulations, not specific to water-retaining structures
用法筆記
Used in civil engineering and hydrology. Distinguish from sense 1 (SHIP CLEARANCE): this sense applies to dams, levees, and flood barriers, not to vessels or boats.
常見錯誤
常見搭配
名詞搭配
- freeboard requirement
- freeboard calculation
常用片語
- meet freeboard standards
- exceed minimum freeboard
介系詞搭配
- freeboard of [measurement]
- freeboard above [level]