平底、船舷側面平坦且棱舭艤線十分尖銳的內陸水域船，於中世紀後普及於北歐地區；船舷側面普遍為魚鱗式；結構上類似於平底尖頭小漁船(dories)。若指傳統上為魚鱗式外殼的小型船隻，則稱為「下底船 (方形艏艉之船舶)」。

平底船(坐底式船舶)　(P,,U,繁體中文-偏好,D,,)
p'ing ti ch'uan (P,,U,韋氏拼音-偏好,UF,U,U)
píng dǐ chuán (P,,U,漢語拼音-偏好,UF,U,U)
ping di chuan (P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
prams(bottom-based watercraft)　(P,,U,英文-偏好,D,U,PN)
pram(bottom-based watercraft)　(,U,英文-非偏好,AD,U,SN)
praams(bottom-based watercraft)　(,U,英文-非偏好,UF,U,N)
prames(bottom-based watercraft)　(,U,英文-非偏好,UF,U,N)
pramen(P,,U,荷蘭語-偏好,D,U,U)
praam(,U,荷蘭語-非偏好,AD,U,U)
pramas(embarcación de base baja)　(P,,U,西班牙語-偏好,D,U,PN)
prama(embarcación de base baja)　(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....物件層面
........裝備與設備
............運輸工具 (層級名)
................<運輸工具>
....................交通工具 (運輸)
........................船舶
............................<依特定種類區分之船舶>
................................<依結構區分之船舶>
....................................<坐底式船舶>
........................................平底船 (坐底式船舶)

藝術與建築詞典根目錄
....物件層面
........裝備與設備
............運輸工具 (層級名)
................<運輸工具>
....................交通工具 (運輸)
........................船舶
............................<依特定種類區分之船舶>
................................<依操作環境區分之船隻>
....................................<依地點位置或背景脈絡區分之船舶>
........................................<內陸水域船>
............................................平底船 (坐底式船舶)

藝術與建築詞典根目錄
....物件層面
........裝備與設備
............運輸工具 (層級名)
................<運輸工具>
....................交通工具 (運輸)
........................船舶
............................<依特定種類區分之船舶>
................................<依形式區分之船舶>
....................................<依斷面形式區分之船舶>
........................................單體船
............................................<平底式船舶>
................................................平底船 (坐底式船舶)

distinguished from....

下底船

英文....	Flat-bottomed, flat-sided, hard-chined inland watercraft common in northern Europe from the Middle Ages onward; sides usually clinker; similar in structure to dories. For small craft, traditionally clinker-built, use "prams (square-based watercraft)."
荷蘭語....	Sedert de 17 eeuw een gestrekt, plat binnenschip met vlakke bodem dat vooral in de Nederlanden werd gebruikt.
西班牙語....	Úsese para embarcación de tierra adentro con fondo llano, lados planos, duro mentón, común en el norte de Europa desde la Edad Media en adelante; los lados son generalmente de escoria; tiene una estructura similar a las doris.

平底船(坐底式船舶)............	[AS-Academia Sinica]
.................	牛津當代大辭典 1448
prams(bottom-based watercraft)............	[VP]
.................	Kerchove, International Maritme Dictionary (1961) 603; prams
.................	Kemp, Oxford Companion to Ships and the Sea (1976) 668; prams
.................	Getty Vocabulary Program rules
pram(bottom-based watercraft)............	[VP]
.................	Getty Vocabulary Program rules
praams(bottom-based watercraft)............	[VP]
.................	Kemp, Oxford Companion to Ships and the Sea (1976) 668
prames(bottom-based watercraft)............	[VP]
.................	Kemp, Oxford Companion to Ships and the Sea (1976) 668
pramen............	[Bureau AAT]
.................	AAT-Ned (1994-)
praam............	[Bureau AAT]
.................	AAT-Ned (1994-)
pramas(embarcación de base baja)............	[CDBP-DIBAM]
.................	Comité, Plural del término en singular
prama(embarcación de base baja)............	[CDBP-DIBAM]
.................	Enciclopedia universal ilustrada europeo-americana (1997) 46:1261
Subject:............	[Bureau AAT]
.................	Van Dale Engels-Nederlands (1989)
.................	Beylen, Zeilvaart lexicon (1985)

Getty AAT: 300232928 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300232928
聯合目錄： 平底船 、p'ing ti ch'uan 、píng dǐ chuán 、ping di chuan 、prams 、pram 、praams 、prames 、pramen 、praam 、pramas 、prama