Hi Mayank, As per my understanding after the introduction of Negative List, the Ocean freight/Air freight incase of Import of Cargo in India is not liable for svc tx. But on the IHC, it may possible that the same is also for the Origin (Tpt from Dry prot to port) & that is the reason why the forwarder/Shipping line has billed u in USD. By the virtue of Rule NO 8 of POP services rules 2012, since the service provider & service receiver (you to whom billed) are in taxable teritory, the said services will be liable for tax.
Incase if the said IHC is performed with in India, you can ask the shipping line that they have wrongly charged the IHC in USD.