Concept:
Ancient Indian literature used different terms for ports, trade centres, dockyards, and maritime activities.
Jain literature also gives references to trade, merchants, ports, and ship-related activities.
Step 1: Understand the word shipyard.
A shipyard is a place where ships are built, repaired, or kept.
In ancient trade literature, such places were often connected with ports and commercial centres.
Step 2: Identify the literary term.
The term used for shipyard in Jain literature is:
\[
\text{Pattan}
\]
Pattan generally refers to a port or harbour town connected with trade and shipping.
Step 3: Final conclusion.
Hence, the correct answer is:
\[
\boxed{\text{Pattan}}
\]