TVIB TRAINING: Last Drydock/Internal Structural Examination Certification Course for the Year – November 8-10

Register today to secure your spot in this year’s final 3 day Virtual Drydock/Internal Structural Examination Certification course. Enjoy completing the course from your home or office. Don’t miss out on this opportunity to prepare you for success in 2023, reserve your seat today!

Course Description:

Subchapter M requires all inspected towing vessels that have obtained a Certificate of Inspection (COI) to undergo a drydock and internal structural examination (DD/ISE) at least once for freshwater vessels and twice for saltwater vessels every five years.

This three-day course will provide those surveyors who plan to conduct drydock and internal structural examinations of inspected towing vessels for compliance with Subchapter M the tools, skills and knowledge to complete these examinations, and provides a path toward an industry-recognized credential. Pre-course online work is also required.

Following the successful completion of this course, individuals seeking to become credentialed DD/ISE surveyors must complete the application process and complete a practical demonstration of surveying skills, which may include a “check ride” with a certified TVIB Drydock/ISE Surveyor.

Individuals who do not intend to conduct drydock and internal structural examinations may attend the course to obtain a better understanding of what is entailed in these compliance activities.

Click here to Register – November 8-10

USCG: SUB M – Pilot House Alerter and Towing Machinery Requirements

Originally posted on Coast Guard Maritime Commons on 09/22/2022

The Office of Commercial Vessel Compliance (CG-CVC) would like to remind all Subchapter M – Towing Vessel owners and operators that while the phase-in allowance to get your Certificate of Inspection (COI) has past, as of July 19, 2022, there are some other requirements for existing vessels that are a prerequisite prior to obtaining the next Renewal COI.  In accordance with 46 Code of Federal Regulations (CFR) §143.200(c) no later than 5 years after the issuance of the first COI for the vessel, all existing towing vessels inspected under Subchapter M must meet the Pilothouse Alerter (46 CFR §143.450) and Towing Machinery requirements (46 CFR §143.460).

Failure to meet these requirements could result in issuance of a CG-835V vessel deficiency and possibly non-renewal of the 5 year COI per 46 CFR §136.215.

If you have any questions regarding the requirement noted above, or an inspection for your towing vessel, please seek your local Officer in Charge, Marine Inspection.  For any questions regarding this blog post, please contact




SUB M: Letter from RDML Arguin to TVIB

TVIB is only as strong as its members which is made up of our TPO customers, certified auditors and surveyors, and our supporting organizations.  Thank you all for being a part of the successful implementation of Subchapter M to usher in the inspected towing vessel regulations. We owe a big thank you to our TVIB staff that work diligently every day to support our mission, our customers and the U.S. Coast Guard in our efforts.

The attached letter was presented to TVIB leadership yesterday, signed by Admiral Arguin. This is something we can all be very proud of.

Click here to download.