To add vessal departure date into BUSY , you need to add optional fields in the BUSY, Please follow below steps :
Step 1: Go to the Administration tab and click on configuration.
Step 2: Choose the Voucher Series Configuration option and select the voucher type for which you want to configure optional field, such as sale, purchase, etc. Then, select the voucher series and click on Voucher Configuration.
Step 3: Next, specify the no. of fields you required on "No. Of Optional Fiels" and enter the all the details such as Field Name, Type, Decimal Places and Maintain Master Database and save the configuration
Step 4: Now, when you create voucher optional field window will appear you can enter your data in that.