The Massachusetts Bay Harbor Safety Committee (MBHSC) is a public forum to facilitate discussion and exchange of ideas, thoughts and advice among all stakeholders on a wide range of issues relevant to the waterways of Massachusetts.. MBHSC is a Public Forum for Collaboration and Promotion of Safety on the Coastal Waterways of Northern and Central Massachusetts. Harbor Safety Committees (HSCs) are local committees that address issues that may include the safety, security, mobility, and environmental protection of a port or waterway.