Overview
JavaScript leads Maritime's secondary barrier stack above the norm
| Value | |
|---|---|
| WAF | 87% |
| Antibot | 22% |
| CAPTCHA | 24% |
| JavaScript | 41% |
| Rate Limiting | 19% |
| TLS | 12% |
WAF at 87% is the dominant barrier. JavaScript (41%) leads secondary coverage. The remaining barriers sit materially lower, giving Maritime a narrow but defined secondary layer.
Barrier Landscape
WAF leads Maritime at 87% — JavaScript is the main secondary layer
| Value | |
|---|---|
| WAF | 87% |
| Antibot | 22% |
| CAPTCHA | 24% |
| JavaScript | 41% |
| Rate Limiting | 19% |
| TLS | 12% |
| Has robots.txt | 62% |
| Blocks AI crawlers | 8% |
WAF dominates at 87%. JavaScript (41%) leads active secondary barriers, followed by CAPTCHA (24%). The remaining three barriers all sit at or below 22% — a concentrated rather than broadly stacked profile.
Maritime's barrier counts are spread — no single configuration dominates
| % of sites | |
|---|---|
| 0 barriers | 11% |
| 1 barrier | 30% |
| 2 barriers | 30% |
| 3 barriers | 14% |
| 4 barriers | 3% |
| 5 barriers | 11% |
| 6 barriers | 1% |
Barrier counts vary widely across Maritime sites. Single-barrier configurations are the modal count at 30%, but the distribution is broad. 29% of sites carry three or more.
Simple is the dominant access tier across Maritime
| Mean recommended tier | |
|---|---|
| All sites | 1.48 |
A mean recommended tier of 1.48 and a median of Simple place Maritime toward the easier end of the sectors surveyed. 65% of sites are Simple to access; 8% require Moderate or above.
Simple is the dominant tier in Maritime, but Easy accounts for a significant share
| % of sites | |
|---|---|
| 1 - Simple | 64.6% |
| 2 - Easy | 27.1% |
| 3 - Moderate | 5.2% |
| 4 - Complex | 2.1% |
| 5 - Advanced | 1% |
Simple (65%) is the most common tier. Simple and Easy together account for 92% of sites, while 5% land at Moderate and 3% at Complex or Advanced.
robots.txt
Nearly two-thirds of Maritime sites publish any robots.txt
| % of sites | |
|---|---|
| Publish a valid robots.txt | 62% |
Only 62% of Maritime sites have a valid robots.txt. Nearly 38% leave crawl policy undefined — one of the lower coverage rates across surveyed sectors.
Most Maritime sites name one bot or none in their robots.txt
| % of sites | |
|---|---|
| 0 | 49% |
| 1 | 31% |
| 2–4 | 6% |
| 5–9 | 6% |
| 10–15 | 3% |
| 16+ | 5% |
49% of Maritime sites name zero agents and 31% name one. A mean of 5.6 is pulled up by a small number of sites with extensive policies, while the median stays at 1.
SEO audit tools and AI crawlers draw near-equal attention in Maritime robots.txt
| % of sites | |
|---|---|
| AI crawlers | 8% |
| SEO / search indexing | 8% |
| SEO audit tools | 9% |
| Commercial scrapers | 4% |
| Social / content scrapers | 2% |
| Archive / research crawlers | 4% |
| Monitoring / uptime bots | 0% |
SEO audit tools appears in 9% of Maritime sites; AI crawlers in 8%. The near-equal split reflects a sector that treats both categories with comparable priority. Figures are percentages of all 100 sites.
Uniform per-agent rules dominate Maritime robots.txt files
| % of sites | |
|---|---|
| Uniform per-agent rules | 42% |
| Path-level mixed rules | 17% |
| Allow-only (no Disallow rules) | 3% |
| Mixed AI posture | 0% |
| Blanket Disallow: / | 0% |
Uniform per-agent rules lead at 42%, with path-level mixed rules at 17%. Mixed AI posture (0%) and blanket Disallow (0%) are minimal.
AI crawlers are among the most-targeted agents in Maritime robots.txt
| Disallowed | Allowed (whitelisted) | |
|---|---|---|
| * | 46% | 21% |
| GPTBot | 7% | — |
| Amazonbot | 6% | — |
| Bytespider | 6% | — |
| CCBot | 6% | — |
| Google-Extended | 6% | — |
| MJ12bot | 6% | — |
| AhrefsBot | 5% | — |
| ClaudeBot | 5% | — |
| Applebot-Extended | 4% | — |
| Baiduspider | 4% | — |
| PerplexityBot | 4% | — |
| Claude-Web | 4% | — |
| FacebookBot | 4% | — |
| anthropic-ai | 4% | — |
| BLEXBot | 3% | — |
| HTTrack | 3% | — |
| ia_archiver | 3% | — |
| Fetch | 3% | — |
| MSIECrawler | 3% | — |
| Offline Explorer | 3% | — |
| SiteSnagger | 3% | — |
| Teleport | 3% | — |
| TeleportPro | 3% | — |
| WebCopier | 3% | — |
Values are percentages of all 100 Maritime sites surveyed. The wildcard (*) leads at 46% Disallow. Among named agents, GPTBot, Bytespider lead the Disallow list — reflecting direct targeting of AI training and indexing bots.
Industry Cohort
Maritime sits mid-table within the Manufacturing & Logistics cohort
| WAF | Antibot | CAPTCHA | JavaScript | Rate Limit | TLS | robots.txt | Blocks AI | Tier | |
|---|---|---|---|---|---|---|---|---|---|
| Aerospace & Defense | 87% | 17% | 26% | 36% | 21% | 15% | 67% | 6% | Tier 1 |
| Chemicals | 83% | 8% | 19% | 31% | 7% | 8% | 71% | 8% | Tier 1 |
| Civil Engineering | 89% | 13% | 22% | 38% | 19% | 14% | 60% | 5% | Tier 1 |
| Import & Export | 93% | 19% | 17% | 35% | 17% | 13% | 69% | 6% | Tier 1 |
| Machinery | 91% | 13% | 17% | 49% | 20% | 15% | 80% | 10% | Tier 2 |
| Mail & Package Delivery | 91% | 15% | 19% | 37% | 17% | 15% | 70% | 3% | Tier 1 |
| Manufacturing | 92% | 20% | 19% | 45% | 24% | 18% | 75% | 9% | Tier 2 |
| Maritime | 87% | 22% | 24% | 41% | 19% | 12% | 62% | 8% | Tier 1 |
| Metals & Mining | 87% | 26% | 30% | 39% | 25% | 16% | 72% | 4% | Tier 1 |
| Plastics & Polymers | 98% | 10% | 29% | 34% | 13% | 10% | 80% | 4% | Tier 1 |
| Transportation & Logistics | 78% | 15% | 16% | 35% | 17% | 18% | 67% | 2% | Tier 1 |
| Warehousing | 98% | 18% | 27% | 38% | 22% | 8% | 75% | 4% | Tier 1 |
Across Manufacturing & Logistics, Maritime's barrier rates are broadly in line with peers. WAF at 87%, JavaScript at 41%, and AI blocking at 8% all sit near the cohort median. Tier difficulty (mean 1.47) is below the group average.