Thank you, Jason. Good morning, everyone, and thank you for joining the Tidewater call. For the third quarter of 2018, we reported a net loss of approximately $31 million on revenues of approximately $99 million.
Consolidated EBITDA for the quarter-ended September 30 was approximately $8 million, which excludes approximately $17 million in noncash impairments, but includes approximately $4 million of stock-based compensation expense and approximately $3 million in general and administrative expenses related to the proposed combination with GulfMark. Excluding these 2 items, adjusted EBITDA for the September quarter was approximately $15 million. Quinn will discuss our financial results in more detail in a few minutes.
Before I get into our operating results for the quarter, I'd like to provide an update on our pending deal with GulfMark. We anticipate favorable outcomes to both companies, stockholder vote is November 15, and we hope to close the transaction on November 15 as well. Post-closing, our combined team looks forward to executing the integration plan that has been refined over the last 4 months. Our intent is to quickly and fully realize cost and other synergies that have been identified and to collectively capitalize upon what we believe to be a recovering offshore market. With a large, young and high-specification OSV fleet and strong positions in key markets such as the North Sea, the U.S., Mexico and Brazil, West Africa, the Mediterranean Sea and the Middle East, the combined company will be a global offshore leader that is well positioned to support our customers in any geo market or in any water depth.
Overall, Tidewater's increased scale and scope of operations, strong financial positions and more efficient cost structure should be a competitive advantage for the company. We are confident that the combination at Tidewater will benefit all stakeholders. High-quality, idle assets and a strong cash position pre- and post-combination with GulfMark also allows us to support sensible vessel reactivation as the market continues to improve, provided our customers can help us make the business case to do so. In particular, a combined Tidewater GulfMark will have approximately 30 vessels that are available for reactivation, generally within 60 days, if it is economically rational to add capacity to the OSV market.
In addition to expectations for better utilization of the active fleet and future market recovery driven momentum and average day rates, currently idle equipment should be a source of organic revenue growth for Tidewater.
For the just-completed September quarter, market dynamics generally fell in line with our expectations. Overall activity levels, while slightly down from the June quarter, seemed to be on a generally positive trajectory. Rate pressure in several regions, primarily driven by continuing overcapacity in the OSV sector, contributed to lower sequential revenue and vessel operating margin.
Ongoing cost reduction efforts, however, have allowed the company to generate reasonable margins in percentage terms and to generate positive EBITDA and cash flow from operating activities for both the quarter and the 9 months ended September 30.
As to outlook, while the trend in commodity prices since early October has been negative, the longer term supply-demand story overall remains supportive of offshore development. As a result, a number of industry analysts indicate that offshore spending should continue to rise through 2022 with incremental offshore CapEx largely driven, at least in the intermediate term, by nondomestic deepwater development. Despite the recent volatility in commodity prices, the global offshore working rig count has been relatively stable and analysts expect the pace of FIDs to accelerate, commencing sometime in 2019.
While next year's budget remain a work-in-progress, tendering activity, request for quotes and recent dialogue with key customers and drilling contractors lead us to expect at least a modest uptick in the working offshore rig count as we move into the second half of 2019. An increase in the working rig count will obviously drive an improvement in OSV utilization and ultimately an improvement in OSV day rates.
For Tidewater, our long-standing relationships with the leading national oil companies and IOCs have remained strong, if not improved during the difficult offshore market of the last couple of years. With recent and expected contract awards giving us confidence that Tidewater will be a primary beneficiary of an increase in offshore activity by companies such as Pemex, Petrobras and Saudi Aramco as well as BP, Chevron, Equinor, ExxonMobil, Shell and Total. The offshore market is moving in the right direction, but continues to be highly fragmented and burdened with excess capacity, as demonstrated by continued rate pressure in the otherwise improving markets.
As a result, we think the pace of improvement will be gradual. [ Victory ] also suggests that the path toward a broad-based industry recovery will likely include a number of twists and turns. Industry cost and financial leverage remain too high and access to capital, particularly debt capital, will likely remain very limited for the foreseeable future.
As to the worldwide operating results, customer revenue was down approximately 7% sequentially. On average, we had 140 active vessels during the September quarter, or down 1 vessel quarter-to-quarter. Active vessel utilization and average day rates were down approximately 3 percentage points and down approximately 4%, respectively. Vessel operating expenses were down approximately 4% sequentially and vessel operating margin was down approximately 3 percentage points sequentially to approximately 33%. As of September 30, our stack fleet was 62 vessels, down 4 vessels quarter-to-quarter.
Moving on to the reporting segment level operating results. Average active vessels in the Americas segment at 27 vessels was unchanged quarter-to-quarter. Vessel revenue for the segment, however, was sequentially down about 14%, primarily reflecting the completion of several projects utilizing larger Tidewater vessels at attractive rates. In addition, as we discussed on our last earnings conference call, a number of vessel charters with Pemex in Mexico, were [ extended a lower ] average day rates. As a result, active vessel utilization and average day rates for the Americas segment were sequentially down, approximately 1 percentage point and down approximately 13%, respectively.
Vessel operating margin, which had been at relatively higher levels in recent quarters, was down approximately $4 million or about 8 percentage points quarter-to-quarter. Americas vessel operating margin for the September quarter was approximately 35%. For the Middle East, Asia-Pac segment, which is driven by larger Middle East operations, vessel revenue in the September quarter was down by about 11% sequentially. As we discussed in our last earnings conference call, this was expected and was driven primarily by pressure on average day rates, particularly in Saudi Arabia. More recently, we have also observed a pullback in construction activity and other shorter-term work across the Arabian Gulf. This also contributes to a sequentially weaker quarter with the average active fleet down 1 vessel and utilization of active vessels down about 4 percentage points quarter-to-quarter.
Looking forward, our active fleet count, active utilization and active day rates should be at least stable with shorter-term construction-related contracts providing some potential upside. For our Europe/Mediterranean Sea segment, vessel revenue was off approximately 6% sequentially and operating expenses were essentially flat quarter-to-quarter. As a result, vessel operating margin was off approximately $800,000 quarter-to-quarter or approximately 5 percentage points.
Within the European/Mediterranean Sea segment, North Sea activity remained relatively robust in the third quarter as anticipated with average day rates in the September quarter up approximately 14% relative to the March quarter. Unfortunately, vessel reactivations and return of additional tonnage to the North Sea for the summer months stalled anticipated season momentum in rates. As a result, vessel revenue and average day rates were relatively flat sequentially. While we have a reasonable mix of [ term and spot ] vessels in the North Sea, active utilization and average day rates should be seasonally weaker for a couple of quarters. And we will look to selectively move equipment to other markets until the 2019 summer season.
In our view, this will be a difficult winter for a number of the more highly-levered, North Sea-centric vessel owners.
Moving to the Mediterranean Sea. Vessel revenue for the September quarter was off 10% sequentially. Like the Middle East, construction-related activity was somewhat softer than expected. Scheduled and unscheduled repairs also contributed to lower utilization of active vessels and higher-than-expected operating cost for the September quarter. With vessel operating margin at or below 20% in recent quarters, the Europe/Mediterranean Sea segment has been challenging for the last couple of quarters. The recent commitment of new charters for a handful of our larger vessel should, however, support a positive trend for vessel revenue and vessel operating margin generated in the Med, at least, for the next quarter or 2.
In addition, incremental scale in the North Sea resulting from a proposed combination with GulfMark should provide opportunities for better cost absorption and improved profitability, particularly, as we move into the seasonally warmer second and third quarters of 2019. Overall, our West African operations were a relative bright spot for the September quarter with modest increase in vessel revenue and modest reductions in operating expenses, each contributing to sequentially better vessel operating margin, both in dollar and percentage terms.
Vessel operating margin for the West Africa segment in the September quarter was approximately 37%. Nigeria and Angola are generally term markets for Tidewater and activity levels in those markets are generally expected to be flat in the near term to the intermediate term. As we discussed during over last call, upside or downside in vessel revenue for our West African operations will likely be driven by better or worse-than-expected utilization and/or average day rates on vessels that are pursuing short-term charters in markets other than Nigeria and Angola along the West African coast.
Turning now to our ongoing focus on expense management. G&A was again in line with our quarterly target of $25 million and run rate, cash G&A for the September quarter, which excludes stock-based compensation expense and professional service cost related to the proposed combination with GulfMark was less than $19 million or a bit less than $75 million annualized. And now I will turn the call over to Quinn, to cover some additional details on our financial performance during the just-completed September quarter.