SEACOR Marine : Crédit Agricole CIB Shipping Conference Presentation – June 2023

SEACOR Marine Holdings Inc.

Energy Transition in the U.S.: Offshore Wind and Decommissioning

5th Annual Crédit Agricole CIB Shipping Conference - Offshore Wind Vessels (New York, 20 June 2023)

Forward-Looking Statement

Certain statements discussed in this release as well as in other reports, materials and oral statements that SEACOR Marine Holdings Inc. ("SEACOR Marine" or the "Company") releases from time to time to the public constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995.

Generally, words such as "anticipate," "estimate," "expect," "project," "intend," "believe," "plan," "target," "forecast" and similar expressions are intended to identify forward-

looking statements. Such forward-looking statements concern management's expectations, strategic objectives, business prospects, anticipated economic performance and financial condition and other similar matters. Forward-looking statements are inherently uncertain and subject to a variety of assumptions, risks and uncertainties that could cause actual results to differ materially from those anticipated or expected by the management of the Company. These statements are not guarantees of future performance and actual events or results may differ significantly from these statements. Actual events or results are subject to significant known and unknown risks, uncertainties and other important factors, many of which are beyond the Company's control. It should be understood that it is not possible to predict or identify all such factors. Consequently, the preceding should not be considered to be a complete discussion of all potential risks or uncertainties. Given these risk factors, investors and analysts should not place undue reliance on forward-looking statements. Forward-looking statements speak only as of the date of the document in which they are made. The Company disclaims any obligation or undertaking to provide any updates or revisions to any forward-looking statement to reflect any change in the Company's expectations or any change in events, conditions or circumstances on which the forward-looking statement is based, except as required by law. It is advisable, however, to consult any further disclosures the Company makes on related subjects in its filings with the Securities and Exchange Commission, including Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K (if any). These statements constitute the Company's cautionary statements under the Private Securities Litigation Reform Act of 1995.

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Agenda

1. Company Overview
2. Offshore Wind
3. Energy Transition: Decommissioning and P&A

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Company Overview

Introduction to SEACOR Marine

• Leading provider of marine and support

transportation services to offshore energy facilities

worldwide

• SEACOR Marine has a diverse customer base

ranging from large offshore oil and natural gas

exploration and production companies, oil field

services and construction companies to offshore

wind farm operators and offshore wind installation

and maintenance companies

• SEACOR Marine offers a wide range of services,

which covers the full offshore energy lifecycle

• SEACOR Marine is consistently investing in leading

edge technology, in order to enhance the

Diversified Asset Base(2)

2022 Property, Plant & Equipment

39% PSV

34% FSV

24% Liftboat

1% AHTS

1% CIP(3)

1% Other

Company Highlights

Revenue Diversification(2)

by Region 2022

by Vessel Class 2022

28%	United States	35%	PSV
31%	Africa & Europe	31%	FSV
26%	Middle East & Asia	26%	Liftboat
6%	Latin America	6%	AHTS
		2%	Other

Energy-Efficient Fleet

sustainability of its operations (walk-to-work

systems, hybrid batteries, fuel efficiency, etc.)

• SEACOR Marine's fleet currently contains six hybrid

PSVs, and SMHI has committed to upgrading one

additional PSV to hybrid propulsion

Market Capitalization(1)

$282.3M

(ticker: SMHI)

Global Presence across 5 continents and all major offshore basins

• 59 Vessels

  8.6 years Average Age

• $400M Revenue Backlog

(including Options)

focusing on reduced fuel consumption and CO2 emissions

1. Bloomberg, as of market close on June 16, 2023.
2. As of FYE December 31, 2022. For continuing operations by Net Book Value for Asset Base.
3. Construction-inProgress (includes FSV Hull 489, whose delivery is deferred indefinitely at the Company's option).
   Source:Company filings.

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Versatile and Diversified Fleet of Modern High-Spec Vessels

PSV	FSV
21 Platform Supply Vessels	25 Fast Support Vessels (1)
Average Age of 5.5 years	Average Age of 9.0 years

Liftboat

9 Liftboats

Average Age of 12.2 years

AHTS

4 Anchor Handling Towing Supply(2)

Average Age of 13.8 years

One of the industry's largest PSV fleets

• Mix of shallow water and deepwater assets
• Modern fleet (6 years average age) and includes six hybrid power vessels (4 years average age)
• Improving demand resulting in higher utilization and day rates

• Deck Space > 800m2: 11 PSVs
• Deck Space < 700m2: 10 PSVs
• Dynamic Positioning (DP-2)

1. Includes one leased-in and two managed vessels.
2. Includes one leased-in vessel.

Large fleet of highly capable FSVs

• Crew transfer and fast cargo
• Focused on premium market with vessels capable of over 30 knots speed, equipped with DP-2 or DP-3
• Includes six Fast Catamarans
• Improving market economics

• Up to 150 passengers
• Up to 40 knots speed
• Dynamic Positioning (DP-2 /DP-3)

Industry's largest fleet of modern liftboats

• Self-propelled,self-elevating, work platforms
• Includes four premium liftboats
• Mission flexible: well intervention and workover, plug and abandonment, decommissioning, offshore wind support and maintenance

• Leg length up to 335 feet
• Working water depth up to 275 feet
• Accommodation up to 150 berths

Non-core vessels

• Perform plug and abandonment, decommissioning, supply, standby safety, jackup support and salvage
• Reduced focus on this asset class going forward

• 8,000 to 15,000 BHP
• 120t + Bollard Pull
• Dynamic Positioning (DP-2)

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