在国际海上集装箱运输中，目前使用的国际集装箱规格尺寸主要是第一系列的4种箱型，即A型、B型、C型和D型。标准箱

A．如果承运人提供代办货物保险业务，此栏填写投保金额

B．如果承运人不提供代办货物保险业务，此栏空白

C．如果托运人不要求投保时，此栏空白

D．此栏填写货物的供海关用声明价值

Irrevocable documentary credit

Number: LC666-12345678

Date: March 5, 2008

Date and place of expiry: April 30, 2008 Shanghai, China

Advising bank: Bank of China

Beneficiary: China AAA Import and Export Corp.

Applicant. U.K. BBB Corp.

Shipment from Shanghai to London, on or about April 5, 2008

Partial shipments: Not allowed

Transshipment: Not allowed

Description of goods: 100% Cotton Towel as per S/C No. CH2008

Total amount: USD10000(SAY US DOLLARS TEN THOUSANDS ONLY)

Total quantity: 200 Cartons

Total gross weight: 17300KGS

Total measurement: 26CBM

Price term: CIF London, U. K.

Following documents required:

+ Signed commercial invoice in triplicate

+ Packing list in triplicate

+ Full set of three clean on board ocean bills of lading made out to order of shipper and endorse in blank and marked "freight prepaid" and notify applicant

+ Insurance Policy in duplicate for full CIF value plus 10% covering All Risks as per Ocean Marine Cargo Clauses of the PICC dated 1/1/1981 and stating claims in London, U. K. , in the currency of the credit

Information :

Ocean Vessel: "CCC" Voy. No. : 005E

Invoice No. : AAA2008-0218

B/L No. : 0688

Container No. : CBHU0180286

中保财产保险有限公司

The People's Insurance(Property)Company of China,Ltd．

发票号码：(11)  保险单号次：

Invoice No.：  Policy No.：

海洋货物运输保险单

MARINE CARGO TRANSPORTATION INSURANCE POLICY

被保险人：(12)

Insured：__________________ __________________

中保财产保险有限公司(以下简称本公司)根据被保险人的要求，及其所缴付约定的保险费，按照本保险单承担险别和背面所载条款与特别条款承保下列货物运输保险，特签发本保险单。

This policy of Insurance witnesses that the People's Insurance(Property)Company of China,Ltd.(hereinafter called"the Company"),at the request of the Insured and in consideratoon of the agreed premium paid by the In-sured，undertakes to insure the undermentioned goods in transportation subject to the condition of this Policy as Per the Clauses printed overleaf and other special clauses attached hereon．

承保险别货物标记

Conditions Marks of Goods

(16)

总保险金额：

Total Amount Insured：__________________

保费载运工具开航日期

Premium as arranged Per conveyance S.S______Slg On or Art______

起运港 目的港

From(17)  to  (18)

所保货物，如发生本保险单项下可能引起索赔的损失或损坏，应立即通知本公司F述代理人查勘。如有索赔，应向本公司提交保险单正本(本保险单共有(19)份正本)及有关文件。如一份正本已用于索赔，其余正本则自动失效。

In the event of loss or damage which may result in a claim under this Policy, immediate notice must be given to the Company's Agent as mentioned hereunder.Claims, if any,one of the Original Pohcy in 2 Original(s)together with the relevant documents shall be surrendered to the Company,if one of the Original Pohcy has been accom-plished, the others to be void．

中保财产保险有限公司

THE PEOPLE'S INSURANCE(PROPERTY)COMPANY OF CHINA,LTD．

赔款地点

Claim payable at______________________________

日期 在

Date(20)  at

地址：

Address：________________________

Consignee : TO ORDER

Notify Party: SHANGHAI INTERNATIONAL CO.,LTD.

请问：

简述海运提单的定义和作用。