Young Fishermen's Development Act This bill directs the National Sea Grant Office in the National Oceanic and Atmospheric Administration to establish a Young Fishermen's Development Grant Program to provide training, education, outreach, and technical assistance initiatives for young fishermen. The office shall make competitive matching grants to support local and regional training, education, outreach, and technical assistance initiatives for young fishermen, including programs, workshops, and services related to (1) seamanship, navigation, electronics, and safety; (2) vessel and engine care, maintenance, and repair; and (3) sustainable fishing practices. Grant recipients must be a collaborative state, tribal, local, or regionally based network or partnership of public or private entities. Grants may not be used to purchase a fishing license, permit, quota, or other harvesting right.