Tools & Wizards About Us
commercialdivingservices.co.uk screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

commercialdivingservices.co.uk

Sub Aqua Diving Services | Civil Engineering | Contractors | Consultants

Page Load Speed

4.1 sec in total

First Response

841 ms

Resources Loaded

3.1 sec

Page Rendered

228 ms

commercialdivingservices.co.uk screenshot

About Website

Click here to check amazing Commercial Diving Services content. Otherwise, check out these important facts you probably never knew about commercialdivingservices.co.uk

Sub Aqua Diving Services provides diving support for any project including marine civil engineering, Nuclear installations and offshore renewables.

Visit commercialdivingservices.co.uk

Key Findings

We analyzed Commercialdivingservices.co.uk page load time and found that the first response time was 841 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

commercialdivingservices.co.uk performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value7.1 s

5/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value520 ms

56/100

30%

CLS (Cumulative Layout Shift)

Value0.753

6/100

15%

TTI (Time to Interactive)

Value7.1 s

51/100

10%

Network Requests Diagram

commercialdivingservices.co.uk

841 ms

bootstrap.min.css

84 ms

bootstrap-responsive.min.css

163 ms

bootstrap-extended.css

229 ms

font-awesome.min.css

242 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 81% of them (69 requests) were addressed to the original Commercialdivingservices.co.uk, 16% (14 requests) were made to Fonts.gstatic.com and 2% (2 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (841 ms) belongs to the original domain Commercialdivingservices.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 44.5 kB (3%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Commercialdivingservices.co.uk main page is 1.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 27.1 kB

  • Original 34.9 kB
  • After minification 32.2 kB
  • After compression 7.7 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 27.1 kB or 78% of the original size.

Image Optimization

-1%

Potential reduce by 7.6 kB

  • Original 1.1 MB
  • After minification 1.0 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Commercial Diving Services images are well optimized though.

JavaScript Optimization

-7%

Potential reduce by 6.8 kB

  • Original 103.8 kB
  • After minification 103.8 kB
  • After compression 97.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-4%

Potential reduce by 3.0 kB

  • Original 84.2 kB
  • After minification 84.1 kB
  • After compression 81.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Commercialdivingservices.co.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 40 (63%)

Requests Now

63

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Commercial Diving Services. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 24 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

commercialdivingservices.co.uk

commercialdivingservices.co.uk

841 ms

bootstrap.min.css

bootstrap.min.css

84 ms

bootstrap-responsive.min.css

bootstrap-responsive.min.css

163 ms

bootstrap-extended.css

bootstrap-extended.css

229 ms

font-awesome.min.css

font-awesome.min.css

242 ms

style-bs2.css

style-bs2.css

235 ms

text_block.css

text_block.css

252 ms

carousel.css

carousel.css

250 ms

rsmg-showcase-font.css

rsmg-showcase-font.css

253 ms

magnific-popup.css

magnific-popup.css

305 ms

style.css

style.css

314 ms

light.css

light.css

320 ms

content.css

content.css

331 ms

template-12.css

template-12.css

421 ms

icons.css

icons.css

341 ms

style-bs2.css

style-bs2.css

381 ms

rsmg-slideshow-font.css

rsmg-slideshow-font.css

392 ms

style.css

style.css

397 ms

bootstrap-carousel.css

bootstrap-carousel.css

412 ms

bootstrap-carousel-slide-effect.css

bootstrap-carousel-slide-effect.css

418 ms

list.css

list.css

457 ms

cookieconsent.min.css

cookieconsent.min.css

475 ms

jquery.min.js

jquery.min.js

556 ms

jquery-noconflict.js

jquery-noconflict.js

491 ms

jquery-migrate.min.js

jquery-migrate.min.js

494 ms

bootstrap.min.js

bootstrap.min.js

501 ms

rspagebuilder.js

rspagebuilder.js

534 ms

core.js

core.js

555 ms

jquery.script.min.js

jquery.script.min.js

572 ms

jquery.magnific-popup.min.js

jquery.magnific-popup.min.js

573 ms

template.js

template.js

581 ms

jquery.mobile.custom.js

jquery.mobile.custom.js

612 ms

device-dropdown.js

device-dropdown.js

634 ms

scrollReveal.min.js

scrollReveal.min.js

632 ms

offscreen.min.js

offscreen.min.js

653 ms

jcarousel.min.js

jcarousel.min.js

651 ms

css

css

35 ms

css

css

54 ms

custom.css

custom.css

661 ms

jquery.touchSwipe.min.js

jquery.touchSwipe.min.js

604 ms

cookieconsent.min.js

cookieconsent.min.js

612 ms

init.js

init.js

546 ms

modernizr.min.js

modernizr.min.js

541 ms

logo.jpg

logo.jpg

161 ms

82b04889cd34c285cab39d0cd445c106.jpg

82b04889cd34c285cab39d0cd445c106.jpg

340 ms

f50bb2b3ae0da8d6888d4fdaa7b1455b.jpg

f50bb2b3ae0da8d6888d4fdaa7b1455b.jpg

315 ms

b950d5b322f3242149e9e1d68cda8b27.jpg

b950d5b322f3242149e9e1d68cda8b27.jpg

327 ms

prev.png

prev.png

163 ms

next.png

next.png

167 ms

testimonial1.jpg

testimonial1.jpg

327 ms

testimonial2.jpg

testimonial2.jpg

398 ms

testimonial3.jpg

testimonial3.jpg

328 ms

testimonial4.jpg

testimonial4.jpg

391 ms

dive-bg5.jpg

dive-bg5.jpg

489 ms

23636cce88f7478db7db0e0f3833cef8.jpg

23636cce88f7478db7db0e0f3833cef8.jpg

421 ms

8b4ae9c757dca87bf4523b93a4879ef1.jpg

8b4ae9c757dca87bf4523b93a4879ef1.jpg

418 ms

288f0ee3ad8a321b4f6211ea37332f78.jpg

288f0ee3ad8a321b4f6211ea37332f78.jpg

423 ms

5b5f71d29db8596dfb97b5fc1dc20a87.jpg

5b5f71d29db8596dfb97b5fc1dc20a87.jpg

468 ms

9001-LOGO.jpg

9001-LOGO.jpg

476 ms

45001-LOGO.jpg

45001-LOGO.jpg

497 ms

DNVGL-LOGO.jpg

DNVGL-LOGO.jpg

501 ms

ADC-LOGO.jpg

ADC-LOGO.jpg

503 ms

ACHILLIES.jpg

ACHILLIES.jpg

543 ms

CONSTRUCTIONLINE.jpg

CONSTRUCTIONLINE.jpg

553 ms

S6uyw4BMUTPHjx4wWw.ttf

S6uyw4BMUTPHjx4wWw.ttf

99 ms

S6u9w4BMUTPHh7USSwiPHA.ttf

S6u9w4BMUTPHh7USSwiPHA.ttf

99 ms

S6u8w4BMUTPHh30AXC-v.ttf

S6u8w4BMUTPHh30AXC-v.ttf

105 ms

S6u9w4BMUTPHh6UVSwiPHA.ttf

S6u9w4BMUTPHh6UVSwiPHA.ttf

104 ms

S6u9w4BMUTPHh50XSwiPHA.ttf

S6u9w4BMUTPHh50XSwiPHA.ttf

104 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

497 ms

fa-solid-900.woff

fa-solid-900.woff

580 ms

fa-brands-400.woff

fa-brands-400.woff

593 ms

fa-regular-400.woff

fa-regular-400.woff

514 ms

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZRekViesC.ttf

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZRekViesC.ttf

105 ms

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZIukViesC.ttf

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZIukViesC.ttf

105 ms

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZou4ViesC.ttf

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZou4ViesC.ttf

105 ms

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZ_O4ViesC.ttf

2-cO9IRs1JiJN1FRAMjTN5zd9vgsFF_5asQTb6hZ2JKZ_O4ViesC.ttf

107 ms

rsmg-slideshow.ttf

rsmg-slideshow.ttf

549 ms

S6u8w4BMUTPHjxsAXC-v.ttf

S6u8w4BMUTPHjxsAXC-v.ttf

106 ms

S6u_w4BMUTPHjxsI9w2_Gwfo.ttf

S6u_w4BMUTPHjxsI9w2_Gwfo.ttf

105 ms

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S6u-w4BMUTPHjxsIPx-oPCc.ttf

130 ms

S6u_w4BMUTPHjxsI5wq_Gwfo.ttf

S6u_w4BMUTPHjxsI5wq_Gwfo.ttf

131 ms

S6u_w4BMUTPHjxsI3wi_Gwfo.ttf

S6u_w4BMUTPHjxsI3wi_Gwfo.ttf

130 ms

SliderArrows.ttf

SliderArrows.ttf

566 ms

rsmg-showcase.ttf

rsmg-showcase.ttf

559 ms

Accessibility Review

commercialdivingservices.co.uk accessibility score

87

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

commercialdivingservices.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

commercialdivingservices.co.uk SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Commercialdivingservices.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Commercialdivingservices.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

commercialdivingservices.co.uk

Open Graph description is not detected on the main page of Commercial Diving Services. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: