209. The international transportation industry has many unique features that require special attention when BOP transactions are measured. Various modes of transport (including sea, air, rail, road, space, and waterways) may be employed, and this chapter discusses the use of enterprise surveys to measure the BOP transactions associated with each of these modes. The implications, for the measurement of transportation services, of the point-of-valuation convention adopted for transactions in goods adds to the complexity of recording transportation industry transactions in the BOP. The BOP treatment of mobile equipment is discussed in chapter 10, paragraphs 442-451; chapter 12, paragraphs 492-507 provide details on the compilation of transportation services. Both of these sections should be read, in conjunction with this chapter, when the compiler is developing international transportation surveys.