on board B/L的中文意思为“已装船提单”，指由船长或承运人的代理人在货物装上指定的船舶后签发的提单。已装船提单的正面载有装货船舶的名称和装船日期，表明货物确已装船。这种提单能够在一定程度上保证收货人按时收货，因此，买方在信用证中也要求卖方提供已装船提单，银行一般也只接受已装船提单。为了更好的理解该词，以下是其英文释义：A document that verifies goods have been placed upon a cargo vessel. Also called shipped-on-board bill of lading.

如：

A bill of lading, however named, must appear to:

Indicate that the goods have been shipped on board a named vessel at the port of loading stated in the credit by:

* pre-printed wording,or

* an on board notation indicating the date on which the goods have been shipped on board.

The date of issuance of the bill of lading will be deemed to be the date of shipment unless the bill of lading contains an on board notation indicating the date of shipment, in which case the date stated in the on board notation will be deemed to be the date of shipment.

提单，无论名称如何，必须看似：

通过以下方式表明货物已在信用证规定的装货港装上具名船只：

* 预先印就的文字，或

* 已装船批注注明货物的装运日期。

提单的出具日期将被视为发运日期，除非提单载有表明发运日期的已装船批注，此时已装船批注中显示的日期将被视为发运日期。